The atmospheric pressure at 1000 m altitude is 0.868 atm.
What is this pressure in Pascals?
Pa

Answers

Answer 1

Answer:0.868

Explanation:

Answer 2

Answer: 87950.1 Pascals


Related Questions

Giant planet atmospheres have layers of clouds and aerosols (tiny liquid droplets) made from different chemicals because:
A) convection does not occur on giant planets.
B) the Coriolis effect affects each chemical compound differently.
C) different chemicals condense at different temperatures.
D) the winds are in the outermost layer.

Answers

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Thus option C is correct option.

What is matter?

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

Giant planet atmospheres have layers of clouds and aerosols (tiny liquid droplets) made from different chemicals because different chemicals condense at different temperatures.

Therefore,  option C is correct option.

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How many molecules are in a 0.00583 mole sample of H₂O?

Answers

Answer:

3.51 x 10²¹ molecules H₂O

Explanation:

To find the amount of molecules in the sample, you need to multiply the amount of moles by Avogadro's Number. Avogadro's Number is a ratio comparing the amount of molecules per every 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (moles should be in the denominator). The final answer should have 3 sig figs like the given value (0.00583 = 3 sig figs).

Avogadro's Number:

6.022 x 10²³ molecules = 1 mole

0.00583 moles H₂O           6.022 x 10²³ molecules
--------------------------------  x  --------------------------------------  =  3.51 x 10²¹ molecules
                                                          1 mole
                                           

Chemistry Worksheet, Atomic Number and Mass Number
Atoms are composed of electrons, protons, and neutrons. It is the difference in the numbers of protons in the atoms that determine the different elements. You can determine the composition of an atom of any element from its atomic number and its mass number. What is the difference between mass number and atomic number?
What is meant by the statement "Atoms are electrically neutral" ?
What does the atomic number of each atom represent?

Answers

The atomic number of an atom is the number of protons in the nucleus of the atom, while the mass number is the total number of protons and neutrons in the nucleus. The atomic number is unique to each element and determines the identity of the element, while the mass number is a measure of the mass of the atom and can vary within an element.

Atoms are electrically neutral when the number of protons in the nucleus is equal to the number of electrons orbiting the nucleus. This means that the positive charge of the protons is balanced by the negative charge of the electrons, resulting in an overall neutral charge for the atom.

The atomic number of each atom represents the number of protons in the nucleus of the atom. This number is unique to each element and determines the identity of the element. For example, the atomic number of hydrogen is 1, which means that it has one proton in its nucleus and is therefore a unique element. The atomic number is used to arrange the elements in the periodic table and is an important property of atoms.

a sample of carbon dioxide gas at 311 k and 0.956 atm occupies a volume of 1.12 l. if the pressure of the gas is decreased, while at the same time it is heated to a higher temperature, the final gas volume

Answers

The final volume will be larger than 1.12L.

What is ideal gas equation?

The Ideal Gas Law is an equation of state for a gas and is also known as the equation of state of an ideal gas. It states that the product of the pressure, volume, and temperature of an ideal gas is a constant. Mathematically, the Ideal Gas Law can be written as PV = nRT, where P is pressure, V is volume, n is the number of moles of the gas, R is the ideal gas constant, and T is temperature. The constant R is equal to the gas constant, 8.314 J/mol-K, divided by the molar mass of the gas. The Ideal Gas Law is an approximation of the behavior of many gases under many different conditions. It is useful because it relates the variables of pressure, volume, and temperature in a simple mathematical relationship.

PV=nRT

Using ideal gas equation

V2= P1V1/T1 ×T2/P2

In this equation P2 is in denominator so when pressure is decreased V2 increases.

T2 is in numerator so when temperature increases V2 increases.
Overall V2 increases.

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The final gas volume will increase

Define the ideal gas law.

The ideal gas law, also known as the perfect gas law, is a relationship between a gas's pressure P, volume V, and temperature T in the range of low pressures and high temperatures where the gas's molecules move virtually independently of one another.

The ideal gas law (PV = nRT) connects the macroscopic characteristics of ideal gases. An ideal gas is one in which the particles are both non-repellent and non-attractive to one another (have no volume).

PV = nRT

P1V1/T1 = P2V2/T2

From tis .pressure is directly proportional to volume

So if pressure is decreased, volume also decreases

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for which one of the following is the enthalpy of the reaction the same as the enthalpy of formation? h2(g)

Answers

The equation in which the enthalpy of formation is the same as the enthalpy of reaction is option A.

What is the enthalpy?

The term enthalpy has to do with the heat that is giving out or is absorbed in a reaction. We know that the enthalpy of formation would refer strictly to the heat that is given out or absorbed when a substances is formed from its constituents under standard conditions.

We know that when we are looking at the enthalpy of formation of a substance, we are looking at the way that the elements that make up the substance are able to combine and these elements that are becoming combined in the substance would have to do that under standard conditions so as to generate the equation of the enthalpy of formation of the substance.

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which of the following will change the pressure in a reaction involving only gases at equilibrium? select all that apply. multiple select question.

Answers

A reactant or product being added to or removed Variations in the container's volume Addition of an inert gas

How would you define "gasses" in this situation?

Dangerous gas emissions are also coming from the planet's surface. Human activity has caused the atmosphere's quantities of carbon dioxide, methane, tropospheric ozone, and nitrous oxide to rise dramatically above pre-industrial levels.

In the singular, what does the word "gas" mean?

The plural version of the word "gas" is "gase," and it refers to a substance that expands to fill any container. Many distinct meanings can be assigned to third-person present tense verbs, such as "gasses."

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Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH . The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C . The results of the experiment are represented in Figure 1.
Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity?
O Peroxidase activity will decrease.
O Peroxidase activity will increase.
O Peroxidase activity will stay the same.
O Peroxidase activity will increase at first and then decrease.

Answers

Based on Figure 1, the following statement best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity:

Peroxidase activity will decrease.

What is Peroxidase activity?

Peroxidases are the most common enzyme and are thought to exist in every living genus. They produce reactive oxygen species and catalyse peroxide reduction. In the current study, we showed that insect infestation causes peroxidase activity in sap and total soluble protein of plant leaves.

For this study, three significant crop plants—cotton, cowpea, and the tomato—were used. Peroxidase activity in the sap and TSP of all the studied plants increased by 1.6 to 3.14 times after chewing insect infestation.

Similar findings were made when sap-sucking insects were fed, increasing the peroxidase activity of the sap and TSP by 1.8 to 2.53 fold. In-gel peroxidase assay confirmed the increased peroxidase activity.

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2020 national emission standards for hazardous air pollutants: miscellaneous organic chemical manufacturing residual risk and technology review

Answers

The U.S. Environmental Protection Agency (EPA) is proposing national emission standards for hazardous air pollutants (NESHAP) for the miscellaneous organic chemical manufacturing (MOCM) source category.

What are Air pollutants?

Air pollutants are substances in the air that can have negative impacts on the environment, human health, and the planet. Common air pollutants include ozone, particulate matter, carbon monoxide, sulfur dioxide, nitrogen dioxide, and lead.

The proposed standards would include national emission limits for hazardous air pollutants (HAP) and work practice standards to reduce emissions of HAP from existing and new MOCM sources. The proposed standards would also require risk and technology reviews to ensure that residual risk to human health and the environment is minimized and that the most stringent emission limits and work practice standards are implemented. The technology review would include a review of available control technologies, as well as a review of the remaining health and environmental risks after controls are implemented. The risk review would consider the overall risk to public health and the environment from the MOCM source category, including both source-specific and cumulative risk. The proposed standards would also require compliance demonstrations, periodic monitoring, recordkeeping, and reporting.

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Arrange the sequence of reactions that occur in the conversion of pyruvate to acetyl-CoA in the correct order: 1) The anion of the hydroxyethyl group attacks one sulfur of the disulfide in lipoic acid, and the resulting intermediate is oxidized to an acetyl thioester. 2) FAD is reduced to FADH2, while the two thiols of reduced lipoic acid are reoxidized back to a disulfide. 3) FADH2 is oxidized by NAD+. 4) Thiamine pyrophosphate decarboxylates pyruvate to yield hydroxyethyl-TPP. 5) The thioester derived from lipoic acid transfers its acetyl group to CoA.

Answers

The right order of processes for converting pyruvate to acetyl-CoA is by the decarboxylation of pyruvate by thiamine pyrophosphate to produce hydroxyethyl-TPP.

Why is decarboxylation crucial?

Given that no heat is introduced when edibles, tinctures, or other consumable products are made, decarboxylation one of the most crucial processes. Tetrahydrocannabinol (THC) and cannabidiol, two of the plant's most important cannabinoids, are activated by decarbing (CBD).

Is decarboxylation required for edibles?

To get high from any cannabis product, decarboxylation must occur. The decarboxylation procedure is still required in order to activate the marijuana in the edible before intake even if eating edibles doesn't include heat like smoking a joint or using a vape pen.

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which of the following options correctly describe the units used to express electrical potential, charge, and electrical energy? select all that apply. multiple select question. the unit for electrical charge has the symbol f. the volt is the unit for electrical potential. electrical energy can be measured in joules. 1 joule

Answers

In joules, electrical energy could be quantified.Volts are used to measure electrical potential.

What units are employed to express the potential of an electric cell?

When referring to this attribute in relation to electrical applications, it is more frequently referred to as voltage. Voltage is a measurement of the energy that accompanies the transfer of charge.The unit of measurement for potentials is the volt (V), which is equal to one joule in energy for every coulomb of charge.

What is potential energy in a cell?

The potential differential between both the two electrodes of an electrochemical cell, which develops when electrons are transmitted through the open circuit of the a cell that has not yet reached equilibrium, is known as the cell potential.

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every day radio are passing right through your body without you even noticing. radio waves have a frequency of about 10^8 Hertz. Calculate the energy of a radio wave

Answers

The energy of the wave can be obtained as 6.6 * 10^-16 J.

What is the energy of the wave?

We know that the energy of a wave has to do with the energy that is possessed by the wave and we can be able to obtain this energy by the means of the equation of Max Plank.

We know that we have the following equation;

E = hf

h = Plank's constant

f = Frequency of the wave

Then we have;

E = 6.6 * 10^-34 Js * 1 * 10^18 Hz

E = 6.6 * 10^-16 J

The radio waves have an energy of about 6.6 * 10^-16 J.

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list the different types of atomic spectrometers​

Answers

Emission spectraAbsorption spectraContinuous spectra.

The different types of atomic spectrometers are emission spectrometer, absorption spectrometer and continuous spectrometer which give emission spectrum, absorption and continuous spectrum respectively.

What is an emission spectrum?

Emission spectrum is defined as a spectrum of a chemical compound or substance composed of frequencies of electromagnetic radiation. Radiations which are emitted while electron make transition from higher to lower energy level.

Energy of photon is equal to the difference between the two energy states . There are many possible electronic transitions in an atom and every transition has a specific wavelength.

Collection of different transitions with respect to different wavelengths makes up an emission spectrum.Emission spectrum of each element is unique and therefore spectroscopy is used to identify elements which are present in different substances.

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explain in at least one full paragraph how your calculated molar mass of butane compares to the actual molar mass of butane, 58.12 g/mol. in your discussion, talk about sources of error in the experimental design.

Answers

Butane's experimental molar mass is 0.23 g/0.0040 moles, or 58 g/mole.13. The molecular formula for butane is C4H10.Calculate its molar mass.58.1 g/mole

How can you determine a molecule's true mass?

We may determine the atomic weights of the elements using their periodic tables, and we discover the hydrogen has had an atomic mass of 1, while that of oxygen is 16.We sum the contributions out of each atom to determine the molecular weight with one water molecule, which is 2(1) + 1(16) = 18 grams/mole.

In what context is relative molar weights used?

The ratio of a average mass with one molecule of the a compound or element to one-twelfth the mass of an atom or carbon-12 is known as the relative molecular mass.Ar has a mass number that is the same as its numerical value.

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for the reaction below identify the structure of the product with appropriate formal charges and the appropriate number of hydrogens on the nitrogen atom

Answers

The given question is incomplete, hence, can not be answered. Still, adding some relevant information for your reference.

What are formal charges?

Formal charge (FC) is the charge associated with the atoms in a molecule, assuming that the electrons of all chemical bonds are shared equally between atoms, regardless of their relative electronegativities. In determining the optimal Lewis structure (or dominant resonance structure) of a molecule, structures are chosen such that the formal charge of each atom is as close to zero as possible.

In chemistry, the formal charge in the covalent view of a chemical bond is assigned to the atoms in a molecule assuming that all chemical bond electrons are equally shared between atoms, regardless of their relative electronegativities. is the virtual charge that Simply put, the formal charge is the difference between the number of valence electrons of an atom in the neutral free state and the number assigned to that atom in the Lewis structure. In determining the optimal Lewis structure (or dominant resonance structure) of a molecule, structures are chosen such that the formal charge of each atom is as close to zero as possible.

The given question is incomplete, hence, can not be answered. Still, adding some relevant information for your reference.

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Name the following compound: CH3CH2CH3

Answers

The following compound: CH3CH2CH3 is propane and this a hydrocarbon and is alkane. Propane seems as a drab fueloline with a faint petroleum-like odor.

The vapors are heavier than air and a flame can flash returned to the supply of leak very easily. The leak can be both a liquid or vapor leak. The vapors can asphyxiate through the displacement of air. Under extended publicity to hearthplace or warmness the boxes might also additionally rupture violently and rocket.

CH3 CH2 CH3 is a compound referred to as a hydrocarbon, greater in particular an alkane. The not unusualplace call for this compound is propane, that is a form of fueloline extensively used as a gasoline supply. It is a hydrocarbon as it includes best hydrogen and carbon atoms.

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It is observed that the reaction producing KCl from its elements goes essentially to completion. Which of the following is a true statement about the thermodynamic favorability of the reaction?

Answers

If the reaction producing KCl from its elements goes essentially to completion, it is likely that the reaction is thermodynamically favorable. This means that the reaction will proceed spontaneously and release energy as it occurs.

Thermodynamic favorability is determined by the change in the enthalpy (heat) and the change in the entropy (disorder) of the system. If the change in enthalpy is negative (exothermic) and the change in entropy is positive (increase in disorder), the reaction is likely to be thermodynamically favorable.

In general, reactions that are thermodynamically favorable are more likely to occur spontaneously and go to completion, while reactions that are thermodynamically unfavorable are less likely to occur spontaneously and may not go to completion. However, other factors, such as the presence of catalysts or the rate at which the reaction occurs, can also affect the likelihood of a reaction occurring.

If the reaction producing KCl from its elements goes essentially to completion, it is likely that the reaction is thermodynamically favorable. This means that the reaction will proceed spontaneously and release energy as it occurs.

Thermodynamic favorability is determined by the change in the enthalpy (heat) and the change in the entropy (disorder) of the system. If the change in enthalpy is negative (exothermic) and the change in entropy is positive (increase in disorder), the reaction is likely to be thermodynamically favorable.

In general, reactions that are thermodynamically favorable are more likely to occur spontaneously and go to completion, while reactions that are thermodynamically unfavorable are less likely to occur spontaneously and may not go to completion. However, other factors, such as the presence of catalysts or the rate at which the reaction occurs, can also affect the likelihood of a reaction occurring.

In which of these substances are the atoms held together by polar covalent bonding?
A) SrCl₂
B) CsCl
C) ClF
D) TiF₂
E) S₈

Answers

Substances in which atoms are  held together by polar covalent bonding is b)CsCl.So,correct option is b.

Polar covalent bond is a kind of compound bond where one sets of electrons is shared unevenly between two molecules. For instance, Hydrogen chloride (HCl) particle. The holding of hydrogen and chlorine iotas inclines more towards Cl particles since Cl is more electronegative in nature than hydrogen

Since Cs has one unpair of electron and Cl has five unpair electron. So, both of elements are favorable for formation of covalent bond.

Properties of Polar Covalent Compound

Physical state: These mixtures can exist as solids because of more noteworthy power of collaborations.Melting and boiling point: These have more prominent liquefying and limit than non-polar mixtures.Conductivity: They direct power in the arrangement state because of the portability of particles.Dissolvability: These are exceptionally dissolvable in polar solvents like water.

Hence,correct option is B.

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A class of widely used chemical coolants known as hydrofluorocarbons (HFCs) have been adopted as replacements for chlorofluorocarbons (CFC) and hydrochlorofluorocarbons (HCFC) in refrigerators and air conditioners. Based on the results of a NASA-derived atmospheric chemistry climateâ model, HFCs cause all except which of the following?

Answers

Chlorine atoms are released when CFCs, which are composed of chlorine, fluorine, and carbon, degrade over time as a result of exposure to UV radiation, and these atoms interact with the ozone molecule to destroy it.

Because they contain hydrogen, HCFCs degrade in the atmosphere more quickly than CFCs do. As a result, HCFCs have less potential to cause global warming as well as ozone depletion. Because they don't contain chlorine, HFCs don't help destroy stratospheric ozone.

Does AC still use CFC?

All new products don't contain CFCs, which were completely phased out of production in 1995. Your local air conditioning expert can replace very old air conditioners with more modern, environmentally friendly models if they still contain CFCs.

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Question-"A class of widely used chemical coolants known as hydrofluorocarbons (HFCs) have been adopted as replacements for chlorofluorocarbons (CFC) and hydrochlorofluorocarbons (HCFC) in refrigerators and air conditioners. Based on the results of a NASA-derived atmospheric chemistry climateâ model, HFCs cause all except which of the following?"

Which atomic model is the one accepted by scientists today?

A) Dalton's model

B) Rutherford's model

C) quantum mechanical model

D) Bohr's model

Answers

The atomic model that is accepted by scientists today is C

Calculate the change in the internal energy of a gaseous system that absorbs 21 J of heat and does 8.0 J of work by expanding.

A. 32 J
B. –32 J
C. –29 J
D. 29 J
E. 13 J
F. –13 J

Answers

The change in the internal energy of a gaseous system that absorbs 21 J of heat and does 8.0 J of work by expanding is 13 J

Energy can only be transformed; it cannot be created or destroyed, according to the First Law of Thermodynamics. For any system, energy transfer examples include mass crossing the control border, external work, or heat transfer over the barrier. The vigor and vitality required for ongoing physical or mental activity is referred to as energy. Heat is the transfer of kinetic energy between two substances, or from an energy source to a material or object. Any action that needs both mental and physical effort to achieve a goal or result is considered work.

ΔE˭q˖w

q= heat added or lost from system

w= work done by system or on system

q is negative when heat is lost

w is negative when a system affects its environment

here, q˭21 and w˭8

ΔE˭21˖(˗8)

ΔE˭13 J

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7. Are the following chemical equations balanced or unbalanced? Balance
any unbalanced equations.
a. 2KClO3 → KCl +30₂
b. Fe+O₂ → FeO
c. 2Li+ Cl₂ → 2LiCl
d. NH3 + HCl → NH4Cl

Answers

Answer:

a. 2KClO3 → 2KCl + 3O2

Explanation:

How many moles of sodium hypobromite (NaBrO) should be added to 1.00 L of 0.050 M hypobromous acid
(HBrO) to form a buffer solution of pH 9.15? (Assume that no volume change occurs when the NaBrO is added)
(Ka=2.5x10)

Answers

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 0.050moles of sodium hypobromite (NaBrO) should be added to 1.00 L of 0.050 M hypobromous acid (HBrO) to form a buffer solution of pH 9.15

What is molarity?

Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

Molarity= number of moles of solute/volume of solution in litre

Where,

moles= ?

volume= 1.00 L

Molarity=0.050 M

Substituting values in equation, we get

0.050=number of moles of solute/1.00

number of moles of solute=0.050moles

Therefore, 0.050moles  of sodium hypobromite (NaBrO) should be added to 1.00 L of 0.050 M hypobromous acid (HBrO) to form a buffer solution of pH 9.15

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Which of the following would NOT be considered valid sources of error in a laboratory experiment? I: Calculation errors II: Inability to calibrate measuring devices III: Using the wrong solution for a reaction
O III only O II only O I only O both I & II O both I & III

Answers

The answer is O II only.

I: Calculation errors would be considered a valid source of error in a laboratory experiment. If the calculations made during the experiment are incorrect, it can affect the accuracy of the results.

II: Inability to calibrate measuring devices would NOT be considered a valid source of error in a laboratory experiment. Calibrating measuring devices is an essential step in any experiment to ensure that the measurements being taken are accurate. If the measuring devices are not calibrated correctly, the results of the experiment will be invalid.

III: Using the wrong solution for a reaction would be considered a valid source of error in a laboratory experiment. If the wrong solution is used, the results of the experiment may not be accurate.

Therefore, II is the only option that would NOT be considered a valid source of error in a laboratory experiment.

The answer is O II only.

I: Calculation errors would be considered a valid source of error in a laboratory experiment. If the calculations made during the experiment are incorrect, it can affect the accuracy of the results.

II: Inability to calibrate measuring devices would NOT be considered a valid source of error in a laboratory experiment. Calibrating measuring devices is an essential step in any experiment to ensure that the measurements being taken are accurate. If the measuring devices are not calibrated correctly, the results of the experiment will be invalid.

III: Using the wrong solution for a reaction would be considered a valid source of error in a laboratory experiment. If the wrong solution is used, the results of the experiment may not be accurate.

Therefore, II is the only option that would NOT be considered a valid source of error in a laboratory experiment.

SO2(g)+Cl2(g)⇌SO2Cl2(g)
K=6.9×10−6 at 1000 K
If a reaction mixture initially contains 0.760 bar each of SO2 and Cl2, what is the partial pressure of SO2Cl2 at equilibrium?

Answers

Answer:

At equilibrium, the partial pressure of a gas is equal to the product of its equilibrium constant and the partial pressure of the other gases it reacts with. In this case, the equilibrium constant is given as K=6.9×10−6 at 1000 K, and the partial pressure of SO2 and Cl2 are both 0.760 bar. Therefore, the partial pressure of SO2Cl2 at equilibrium is:

6.9×10−6 * 0.760 bar * 0.760 bar = 4.3×10−8 bar

So the partial pressure of SO2Cl2 at equilibrium is 4.3×10−8 bar.

There are so many types of chemical reaction reaction like combination reaction, double displacement reaction. To solve such this we must know the concept of equilibrium reaction. Therefore, the partial pressure of SO[tex]_2[/tex]Cl[tex]_2[/tex] at equilibrium is 4.3×10⁻⁸bar.

What is chemical reaction?

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.

The balanced equation can be written as

SO[tex]_2[/tex](g)+Cl[tex]_2[/tex](g)⇌SO[tex]_2[/tex]Cl[tex]_2[/tex](g)

K=partial pressure of SO[tex]_2[/tex]Cl[tex]_2[/tex] ÷(partial pressure of SO[tex]_2[/tex] × partial pressure of Cl[tex]_2[/tex] )

Substituting all the given values, in the above equation, we get

6.9×10⁻⁶ = (0.760 bar × 0.760 bar)÷partial pressure of SO[tex]_2[/tex]Cl[tex]_2[/tex]

              = 4.3×10⁻⁸bar

Therefore, the partial pressure of SO[tex]_2[/tex]Cl[tex]_2[/tex] at equilibrium is 4.3×10⁻⁸bar.

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One mole of oxygen gas is at a temperature of 30°C. If the gas is heated at constant volume until the pressure triples, what is the final temperature?

A. 60°C
B. 50°C
C. 363 K
D. 423 K

tysm! :)​

Answers

Considering the Gay-Lussac's law, the final temperature when the gas is heated at constant volume until the pressure triples is 909 K or 636° C.

Gay-Lussac's law

Gay-Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant. This law says that the pressure of a gas is directly proportional to its temperature: if the temperature increases, the pressure will increase, while if the temperature decreases, the pressure will decrease.

Mathematically, Gay-Lussac's law states that the ratio between pressure and temperature always had the same value:

P÷ T= k

where

P is the pressure.T is the temperature.k is a constant.

Analyzing an initial state 1 and a final state 2, it is fulfilled:

P₁÷ T₁= P₂÷ T₂

Final temperature

In this case, you know that the gas is heated at constant volume until the pressure triples. This is, P₂=3×P₁

Replacing in Gay-Lussac's law:

P₁÷ T₁= (3×P₁)÷ T₂

T₂× (P₁÷ T₁)=(3×P₁)

T₂= (3×P₁)÷ (P₁÷ T₁)

T₂= 3×T₁

If one mole of oxygen gas is at a temperature of 30°C of 303 K (being 0 C= 273 K), then:

T₂= 3×303 K

T₂= 909 K = 636° C

Finally, the final temperature is 909 K or 636° C.

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How many grams are in 0.0823 moles of Ar? given; unknown:

Answers

Answer:

3.2877204

Explanation:

Classify each of the following as a Strong acid (sa) or a Weak acid (wa) and indicate how each should be written in aqueous solution. Classify In solution this acid should be written as: 1. nitrous acid H 2. hydrochloric acid 3. perchloric acid Classify each of the following as a Strong acid (sa) or a Weak acid (wa) and indicate how each should be written in aqueous solution. Classify In solution this acid should be written as: 1. phosphoric acid 2. sulfurous acid 3. carbonic acid

Answers

Nitrous acid, phosphoric acid, sulfurous acid and carbonic acid are the  weak acids. Hydrochloric acid and perchloric acid is a strong acid. This can be Written in the aqueous solution.

Nitrous acid is a weak acid and can be written in the aqueous solution as,

HNO2 (aq.) ----> H+ (aq.) + NO2- (aq.)

This is very unstable and exists only in aqueous solution.

Hydrochloric acid is a strong acid and can be written in the aqueous solution as,

HCl(aq.) ------> H+ (aq.) + Cl -(aq.)

perchloric acid  is a strong acid and can be written as

HClO4 (aq.) ---->   H+ (aq.) + ClO4- (aq.)

Phosphoric acid is a weak acid. It is a triprotic acid that exists as a dense liquid. It is an irritant or corrosive to the skin, eyes. It can be written in the aqueous solution as,

H3PO4 (aq.) ----> H+ (aq.) + H2PO4- (aq.)

sulfurous acid is a weak acid and can be written as,

H2SO3 (aq.) ----> H+ (aq.) + HSO3- (aq.)

carbonic acid is a weak acid. Carbonic acid is a carbon-containing compound which has the chemical formula H2CO3. This can be written in the aqueous solution as,

H2CO3 (aq.)  ----> H+ (aq.) + HCO3- (aq.)

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If the following rate constant, Kf, and the reverse rate constant, Kr, for a chemical reaction are NOT equal, which must be true.
a: The reaction will be unable to acheive equilibrium
b: Kf and Kr will become equal as equilibrium is approached owing to concentration changes.
c: Kf and Kr will become equal as equilibrium is approached owing to temperature changes
d: Kf and Kr will remain unequal bot rates will become equal owing to concentration changes
e: Kf and Kr will remain unequal but the rates will become equal owing to temperature changes

Answers

d. Despite the fact that kf and kr will continue to be unequal, rates will become equal due to concentration changes.

At equilibrium, are Kf & Kr equivalent?

When the forwards rate (kf[A]) equals equal reverse rate (kr[B]), the system has reached equilibrium and the concentrations of the reactant and product have stopped changing.

What in chemistry are KF and KR?

Chemical kinetics governs all chemical reactions, whether they are reversible or not.So, by applying the idea of chemical kinetics, we may better grasp the equilibrium constant K.As illustrated below, let kr be the rate of the reverse reaction and kf be the rate of the forward reaction.

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Calculate the standard cell potential for each reaction below, and note whether the reaction is spontaneous under standard state conditions.
(a) Mg(s) + Ni2+(aq)⟶ Mg2+(aq) + Ni(s)
(b) 2Ag+(aq) + Cu(s)⟶ Cu2+(aq) + 2Ag(s)
(c) Mn(s) + Sn(NO3)2(aq)⟶ Mn(NO3)2(aq) + Sn(s)
(d) 3Fe(NO3)2(aq) + Au(NO3)3(aq)⟶ 3Fe(NO3)3(aq) + Au(s)

Answers

The standard cell potential (also known as the standard electrode potential) is a measure of the potential difference between two electrodes in an electrochemical cell under standard state conditions.

(a) Standard Cell Potential for Mg(s) + Ni2+(aq)⟶ Mg2+(aq) + Ni(s):

E0cell = (0.79 - (-0.25))V = 1.04 V.

This reaction is spontaneous under standard state conditions.

(b) Standard Cell Potential for 2Ag+(aq) + Cu(s)⟶ Cu2+(aq) + 2Ag(s):

E0cell = (0.34 - (-0.52))V = 0.86 V.

This reaction is spontaneous under standard state conditions.

(c) Standard Cell Potential for Mn(s) + Sn(NO3)2(aq)⟶ Mn(NO3)2(aq) + Sn(s):

E0cell = (0.15 - (-0.14))V = 0.29 V.

This reaction is spontaneous under standard state conditions.

(d) Standard Cell Potential for 3Fe(NO3)2(aq) + Au(NO3)3(aq)⟶ 3Fe(NO3)3(aq) + Au(s):

E0cell = (1.23 - (-1.50))V = 2.73 V.

This reaction is spontaneous under standard state conditions.

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Consider a gradient elution run of non-polar compounds in reverse
phase HPLC with a methanol-water gradient. Does the mobile phase
start as pure water and then end up as pure methanol or is it done the
other way? Explain your reasoning fully.

Answers

The order of elution in reversed-phase HPLC is different from that in a normal-phase separation, with more polar solutes eluting first. The mobile phase's polarity is increased to produce longer retention periods.

What is HPLC ?

A method in analytical chemistry called high-performance liquid chromatography, formerly known as high-pressure liquid chromatography, is used to separate, recognize, and quantify each component in a mixture.

To obtain a consistent increase in the organic solvent (usually methanol or acetonitrile) over the course of the study, gradients in reversed-phase HPLC typically use on-line (dynamic) mixing of solvents. This increases the elution strength of the eluent over time.

Thus, In contrast to the normal phase HPLC, which employs a polar stationary phase and a less polar mobile phase, the reverse phase HPLC makes use of a nonpolar stationary phase and a polar mobile phase.

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