Chemistry College

Which number completes the balanced chemical equation showing the process of rusting?

4Fe + 3O2 ---> ____Fe2O3

A. 1

B. 2

C. 4

D. 12

Answers

Answer 1

Answer:

B. 2

Explanation:

HAPPYYYY TURKEY BREAK

Answer 2

Answer:

2

Explanation:

Related Questions

How many grams of copper (II) nitrate would be produced from 0.80 g of copper metal reacting with excess nitric acid?

Answers

Answer:

[tex]m_{Cu(NO_3)_2}=2.36 gCu(NO_3)_2[/tex]

Explanation:

Hello!

In this case, since the chemical reaction between copper and nitric acid is:

[tex]2HNO_3+Cu\rightarrow Cu(NO_3)_2+H_2[/tex]

By starting with 0.80 g of copper metal (molar mass = 63.54 g/mol) and considering the 1:1 mole ratio between copper and copper (II) nitrate (molar mass = 187.56 g/mol) we can compute that mass via stoichiometry as shown below:

[tex]m_{Cu(NO_3)_2}=0.80gCu*\frac{1molCu}{63.54gCu} *\frac{1molCu(NO_3)_2}{1molCu} *\frac{187.56gCu(NO_3)_2}{1molCu(NO_3)_2} \\\\m_{Cu(NO_3)_2}=2.36 gCu(NO_3)_2[/tex]

However, the real reaction between copper and nitric acid releases nitrogen oxide, yet it does not modify the calculations since the 1:1 mole ratio is still there:

[tex]4HNO_3+Cu\rightarrow Cu(NO_3)_2+2H_2O+2NO_2[/tex]

Best regards!

Amount of copper (II) nitrate would be produced is 2.25 gram

Molecular mass:

Given that;

Amount of copper metal = 0.80 g

Find:

Amount of copper (II) nitrate would be produced

Computation:

Cu + 4HNO₃ → Cu(NO₃) + 2NO₂ + 2H₂O

Number of moles = Given mass / Molecular mass

Number of moles = 0.80 / 63.5

Number of moles = 0.012 mol

So,

n = Given mass / Molecular mass

0.012 = Given mass / 63.5 + (63.5 + 48)

Given mass = 2.25 gram

Amount of copper (II) nitrate would be produced = 2.25 gram

Find more information about 'Molecular mass'.

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Why did the hot water rise? Use faster, molecules, energy, density in your answer.

Answers

Answer:

Convection

Explanation:

Hot water will rise due to heat transfer by convection occurring in the heating system.

When a fluid is heated, the molecules will gain thermal energy. As the thermal energy of the liquid increases, the molecules will have heat which is average kinetic energy in the system. This causes them to be less denser and they rise in the cooking medium. As they rise, the colder part of the water sinks down to replace them in the pot. This exchange sets up convection cells in the heating medium.

Choose the formula for ammonium.
ΝΗ,
b NH3
C
(NH)3N

Answers

Answer:

NH4+ will be ammonium, NH3 is ammonia which is the conjugate base of ammonium.

Explanation:

A student drew a diagram of the quantum model of an atom, as shown.


A small circle is shown. Six light gray spheres and six dark gray spheres are shown inside the circle. On the outer side of the circle is another circle of larger radius. This circle has two small circle on its boundary. Another circle of even greater radius is on the outside of the second circle. This outermost circle has four small circles on its boundary.


Which of the following explains if the student's diagram is correct or incorrect?


A - The diagram is incorrect because electrons follow an elliptical path instead of a circular path.

B - The diagram is incorrect because the exact location of the electrons cannot be determined.

C - The diagram is correct because protons and neutrons are concentrated at the center of the atom.

D - The diagram is correct because electrons are present in distinct energy levels around the nucleus.

Answers

The diagram is correct because electrons are present in distinct energy levels around the nucleus. Option D

What is the quantum model?

Let nus just take a minute to be able to remind ourselves that when we look at the atom that there are several subatomic particles that can be shown to be able to make up the atom. We know that the electron is the particle that can be shown to be arranged in shells.

What we saw in the inner or the core of the atom is the nucleus and the six grey spheres  that we can see there would have to do with the nucleus of the atom that is in the question.

As we now look up at the shells, we can see the electrons as they have been arranged into the respective shells were they can be found in the atom on the basis of the energy that they possess.

Learn more about atoms:https://brainly.com/question/13654549?

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