This element forms a red solution when it complexes with thiocyanate, and although it is not aluminum, a chloride of this element catalyzes a Friedel-Crafts alkylation. The oxide of this element is used industrially to produce ammonia in the Haber-Bosch process, and this element exists in a solid solution with carbon in its gamma variety austenite. This element is derived from the ore hematite, and its brass-colored pyrite is commonly known as "fool's gold". For 10 points, name this transition metal with chemical symbol Fe.

Answers

Answer 1

Based on the cues Fe is nothing but ferric which is iron.An very crimson solution containing the ion [Fe (SCN) (H 2 O) 5] results when thiocyanate ions, SCN -, are added to a solution containing iron (III) ions, such as sodium, potassium, or ammonium thiocyanate solution. 2+

In the electrophilic aromatic substitution reaction known as "Friedel-Crafts alkylation," an alkyl substituent is attached to an aromatic ring (benzene). Lewis acids, such as AlCl3 and FeCl3, catalyze these reactions and aid in the production of carbocations from alkyl halides.

The solid phase of the Haber-Bosch Process is heterogeneous catalysis. Both hydrogen and nitrogen, the reactants, are gases. They are both poured into a vessel at a high temperature and extreme pressure in the presence of iron oxide.

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Related Questions

6. Menthol is a member of the terpene family of natural products. It exists in a (1R, 2S, 5R) form and a (IS, 2R, 5S) form. Are these two compounds enantiomers or diastereomers?
​​

Answers

Here ya go if you need the link we’re I found this answer key https://studylib.net/doc/8708211/exam-2---chemistry

I need help please. No links/ irrelevant answers or I will report you
Data:
2Fe(s) + O2(g) => 2FeO(s) ΔH = -545.6 kJ
4Fe(s) + 3O2(g) => 2Fe2O3(s) ΔH = -1,643.6 kJ
3Fe(s) + 2O2(g) => Fe3O4(s) ΔH = -1,117.7 kJ

Given the data above, determine the heat of reaction, ΔH, for the reaction:
2 Fe3O4(s) => 2 Fe2O3(s) + 2 FeO(s)

Answers

Answer:

ΔH = 46.2 kJ

Explanation:

Hello there!

In this case, according to the given set of reactions and the required one, it is possible to apply the Hess' rule in order to realize the following manipulations to obtain the required reaction:

1. Keep this reaction as it is.

2Fe(s) + O2(g) => 2FeO(s) ΔH = -545.6 kJ

2. Keep this reaction as it is.

4Fe(s) + 3O2(g) => 2Fe2O3(s) ΔH = -1,643.6 kJ

3. Reverse double this reaction so that we obtain:

2Fe3O4(s) => 6Fe(s) + 4O2(g) ΔH = -(-1,117.7 kJ)*2=2235.4kJ

Add them up to obtain:

2Fe(s) + O2(g) + 4Fe(s) + 3O2(g) + 2Fe3O4(s) => 6Fe(s) + 4O2(g) +2Fe2O3(s) + 2FeO(s)

Simplify common terms to obtain:

2 Fe3O4(s) => 2 Fe2O3(s) + 2 FeO(s)

Therefore, the enthalpy of such reaction is:

ΔH = 2235.4kJ -545.6 kJ -1,643.6 kJ

ΔH = 46.2 kJ

Best regards!

Which statement defines enzymatic activity? Enzymes are required to slow down biological reactions within cells. Specific enzymes can catalyze a wide variety of chemical reactions. Enzymes regulate cellular functions through feedback mechanisms. Enzymes bind substrates so that reactive groups have many different orientations.

Answers

Answer:

Enzymes are required to slow down biological reactions within cells,

this could be not sure

Answer:

D

Explanation:

Enzymes bind substrates so that reactive groups have many different orientations.

Calculate the mass (grams) of 0.750 moles of Al2(Cr2O7)3

Answers

Answer:

526g is the mass of this sample

Explanation:

To solve this question we must, as first, find the molar mass of Al₂(Cr₂O₇)₃ using the periodic table. The molar mass is defined as the mass of this compound per mole. With this value we can find the mass in 0.750 moles as follows:

Molar mass Al₂(Cr₂O₇)₃

2Al = 2*26.98g/mol = 53.96g/mol

6 Cr = 6*51.9961g/mol = 311.9766g/mol

21 O = 21*15.999g/mol = 335.979g/mol

53.96g/mol + 311.9766g/mol + 335.979g/mol

= 701.9156g/mol

The mass of 0.750 moles is:

0.750 moles * (701.9156g / mol) =

526g is the mass of this sample

Formula mass of Ca(NO2)2

Answers

Answer: 132.1 g/mol

Explanation: 40.08 + 2·(14.01+2·16)

A student is heating a crystal of alum to
determine the hydrate formula. If she removes
it from the heat before all the water has been
removed, what will happen to the calculated
hydrate formula?
A. It will not be affected by the error.
B. The mole ratio will indicate less water than was
actually present.
C. The mole ratio Will indicate less alum than was
actually present.

Answers

I think It’s probably a

Which of the following are diatomic elements? Select all that apply.
A.Hydrogen
B.Boron
C.Bromine
D.Iodine

Answers

Answer:

C

Explanation:

A diatomic element in that list is Bromine

N₂ + 3H₂ --> 2NH₃

If 207.0 g of H₂ reacts, what mass of NH₃ is produced?

Answers

Answer:

69mol

Explanation:

The balanced chemical equation given in this question is as follows;

N₂ + 3H₂ → 2NH₃

The above balanced equation shows that 3 moles of hydrogen gas (H2) reacts to produce 2 moles of ammonia (NH3).

To convert the given mass of hydrogen to moles, we use the following formula:

mole = mass/molar mass

Molar mass of H2 = 2g/mol

mole = 207/2

= 103.5mol

If 3 moles of H2 produce 2 moles of NH3,

Then, 103.5mol of H2 will produce 103.5 × 2 / 3

= 207/3

= 69mol

The gases are contained in a reaction vessel and are in equilibrium at 298 K

X2Zi â 2XZ2(g)


a. Activation energy
b. Total mass of the system
c. Molar concentration of XZ4(g)
d. Number of molecules present
e. Equilibrium constant

1. Is decreased by the addition of a catalyst?
2. Is decreased when the volume of the reaction vessel is increased and equilibrium is reestablished at 298 K?

Answers

Answer:

1) Activation energy  ( A )

2) Molar concentration of X[tex]_{2}[/tex]Z[tex]_{4}[/tex](g) ( C )

Explanation:

X[tex]_{2}[/tex]Z[tex]_{4}[/tex](g) ⇄ 2XZ

1) Activation energy Is decreased by the addition of a catalyst

while Equilibrium constant will Increase and other options will still remain unaffected

2)Molar concentration of X[tex]_{2}[/tex]Z[tex]_{4}[/tex](g) Is deceased when the volume of the reaction vessel is increased and equilibrium is reestablished at 298 K

while Number of molecules present will Increase

Air pressure is greatest ____ because there are more molecules of air pushing down from above.
a.
at the top of the mountain
c.
in the troposphere
b.
at sea level
d.
in the exosphere


Please select the best answer from the choices provided

Answers

Answer:A

Explanation:

I just know it

Answer:

The correct answer is B

How do organisms get their genes?
ANSWER CAREFULLY!!!

Answers

Answer:

born

Explanation:

they get bornnnnnnnn

Answer:

by their mummy and daddy

Explanation:

if their mummy has blue eyes but their Duddy has brown eyes if the child has brown eyes then the dud has the most dominatetrait

have a good day mate

Help me! Who ever gets to answer and has the best answer gets brainliest

Answers

Answer:

Decay-the breakdown of dead plants..

Earth- thermal energy comes from deep inside...

Fires- these consume feul...

Explanation:

Answer:

Fires - These consume fuel and covert chemical energy stored in that fuel into thermal, light and sound energy

Decay - The breakdown of dead plants and animals produces thermal energy

Earth - Thermal energy comes from deep inside and is called geothermal energy

Explanation:

Fires, when you burn wood, you convert chemical energy from the wood into thermal (warmth from the fire), light (glow from the fire), sound (crackling sound of wood burning)

Decay - I can't explain that one to you but there are power plants that use decomposition to produce energy

Earth - Beneath the crust there is the mantle, which consists of molten rock which produces a lot of thermal energy. This can be seen in geysers, where the molten rock heats water and hot water can burst out of the surface. Applies to hot springs too

Chlorofluorocarbons may be harming the ozone layer by ____.
a.
adding more ozone molecules
c.
destroying ozone molecules
b.
blocking ultraviolet radiation
d.
adding carbon dioxide molecules


Please select the best answer from the choices provided

Answers

Answer:

The awnser is C. Hope that helps!!!

What would happen to the position of the equilibrium when the following changes are made to the reaction below?
2HgO(s) ↔ Hg(l) + O2(g)

1.) The pressure on the system decreases.

Answers

Any impact on pressure will only affect gas molecules. So in this question the reactant has 0 gas molecules and the products have 1 gas molecule (the O2 molecule).

This means when you decrease the pressure the equilibrium will shift in order to oppose this change.

As you decreased the pressure it will move to the reaction that will increase the pressure back to equilibrium. So if you decrease pressure the equilibrium will shift to the right hand side (forward reaction) to oppose the change in pressure and a higher yield of Hg(l) and O2(g) will be produced.

Plz help me well mark brainliest if correct!!

Answers

Answer:

A

Explanation:

Waxing means getting bigger.

Waning is.. you guessed it... the exact opposite.

Answer:

a

Explanation:

..........................

29. Which is the electron configuration of an atom
in the excited state?
(1) 1s 2s²2p2
(2) 1s 2s22p'
(3) 1s 2s22p5352
(4) 1s²2s²2p%35'

Answers

2 is right am 70 percent sure

A 250mL beaker is submerged in a large container of Liquid A and turned upside down, and another 250mL beaker is submerged and turned upside down in a large container of Liquid B. Hydrogen H2 gas is bubbled into each upside-down beaker until 100mL of liquid has been displaced. The masses mA and mB of hydrogen inside each beaker is then chemically determined. Note for advanced students: you may assume the solubility of H2 in either liquid is very low.

a. mx will be greater than my
b. mx will be less than my
c. mx will be equal to my
d. It's impossible to predict whether mx or my will be greater without more information.

Answers

Answer:

Mx will be less than My.

Explanation:

The correct option is - Mx will be less than My.

Because, liquid X have been higher viscosity and vapor pressure than liquid B.

Vapor pressure of liquid A is greater, so the amount of liquid X will vaporized greater and H2 gas has been displaced greater from the beaker as compared to liquid Y.

The amount of H2 in liquid Y remains greater in beaker as compared to liquid X.

So, Mx will be less than My.

NEED HELP ASAP

Imagine that you have a sample of a substance. You cannot physically separate that substance into components. You also cannot chemically separate that substance into components. Which of the following are true about your sample?

The sample is made up of multiple elements. t or f
The sample is made up of one type of atom. t or f
The sample is made up of several types of atoms. t or f
The sample is made up of a single element. t or f

Answers

Answer:

The sample is made up of a single element. t or f

Explanation:

Forgot about the t or f!   Its true.

Dam bro.....

1. T

2. F

3. T

Answer:

i think its the 3 thired one sorry if rong but good luck

Explanation:

Can someone help me I am stuck on this question it would mean the world if u helped me =) have a nice day!

Answers

Deer! They are herbivores:))
a deer is a consumer not a decomposer so therefore the answer is , deer!

How many internal parts or “organelles” are there in a plant cell?
please i need a answer!

Answers

Answer: it has 2 parts

Explanation:

Firstly, plant cells have a cell wall that surrounds the cell membrane, whereas animal cells do not. Plant cells also possess two organelles that animal cells lack: chloroplasts and a large central vacuole

Is c6h4cl2 soluble in water?

Answers

Answer:

slightly but poorly

Explanation:

it is a white crystalline solid that is practically insoluble in water and soluble in ether, chloroform, carbon disulfide, benzene, alcohol and acetone.

2. A chemical's flash point is the​

Answers

Flash point is the minimum temperature at which a liquid forms a vapor above its surface in sufficient concentration that it can be ignited.

You have 1.2 x 10^25 particles of NiCO3. How many grams are present?

Answers

Answer:

2365.0 g

Explanation:

First we convert 1.2 x 10²⁵ particles into moles, using Avogadro's number:

1.2 x 10²⁵ particles ÷ 6.023x10²³ particles/mol = 19.9 mol

Then we convert 19.9 moles of NiCO₃ into grams, using the molar mass of NiCO₃:

NiCO₃ Molar Mass = 118.702 g/mol19.9 mol * 118.702 g/mol = 2365.0 g

A gas is contained in a thick-walled balloon. When the pressure changes from ___ kPa to 114 kPa, the volume changes from 0.654 L to 1.32 L and the temperature changes from 596 K to 715 K.​

Answers

Answer: 191.8

Explanation:

Answer:

191.8

Explanation:

I know the answer is correct I got the exact same one :)

In what form metals are found in nature

Answers

Answer:

Metals in nature are found in rock form, mineral forms etc..

Answer:

Metals are found in rock

Spiders create their webs on the stems and trunks of trees. The tree is unaffected by the spider web.
1.predation
2.commensalism
3.parasitism
4.mutualism

Answers

Answer:

it would be 2

Explanation:

Spiders create their webs on the stems and trunks of trees. The tree is unaffected by the spider web.

2.commensalism

- Rachel performed an investigation to study the thermal conductivity of four different materials. She started with four identically shaped rods—each made of a different material. Then, she placed one end of each rod into a pot of boiling water, which was at 100°C.

- After five minutes, Rachel measured the temperatures of the ends of the rods that were sticking up out of the pot to see whether they got hot. Her results are shown below.

Thermal Conductivity Investigation
Material Temperature of End of Rod After 5 Minutes
Material 1 41°C
Material 2 53°C
Material 3 98°C
Material 4 59°C

- Rachel knows that one of the materials is copper and that copper conducts thermal energy very well. Which of the materials is most likely copper?


A.
material 1
B.
material 3
C.
material 4
D.
material 2

Answers

Answer:

I will have the maths book

Answer:98

Explanation:

2. According to Newton's second law of motion, in which of these situations is the object
accelerating? a. A book on a shelf b. A rock sitting on the ground c. A helium balloon tied to a
lamppost d. A ball that has been thrown upward

Answers

Answer:

the Answer is A ball that has been thrown upward

A reaction has a theoretical yield of 27.6 g. When the reaction is carried out, 13.4 g of the product is obtained. What is the percent yield?

A) 48.6 %
B) 206 %
C) 370 %
D) 64.7 %

Answers

I believe it’s A

13.4 is 48.6% of 27.6

Answer:

yee I'm excellent in maths and science

Which sound frequency with a human ear be able to detect? Select ALL correct answers.

100 Hertz

1,000 Hertz

10,000 Hertz

100, 000 Hertz

The answers are 100, 1,000, 10,000 if your are with K12

Answers

Answer:

100 HZ 1,000 HZ 10,000 HZ there you go :)

Answer:

100 hertz, 1,000 hertz, and 10,000 hertz

Explanation:

I took the k12 test :)

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