Chapter 10 Stoichiometry Chapter Practice

Chapter 10 Stoichiometry Chapter Practice

10th Grade

77 Qs

quiz-placeholder

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Chapter 10 Stoichiometry Chapter Practice

Chapter 10 Stoichiometry Chapter Practice

Assessment

Quiz

Chemistry

10th Grade

Hard

Created by

Diana Leal

Used 1+ times

FREE Resource

77 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why must a chemical equation be balanced before you can determine mole ratios?

Because the coefficients in a balanced equation directly represent the mole ratios of the reactants and products.

Because balancing ensures that the charges are balanced in the equation.

Because balancing eliminates any excess reactants.

Because balancing influences the energy changes in a reaction.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Determine the relationships from a balanced chemical equation.

Mole ratios among reactants and products

The identity of the compounds only

The rate of the reaction

The equilibrium constant

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Mole ratios are central to stoichiometric calculations because they provide conversion factors from one substance to another.

They provide conversion factors from one substance to another.

They ensure reaction conditions are optimal.

They indicate reaction speed differences.

They determine catalyst effects.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Determine the mole ratio that can convert moles of A to moles of B.

1:1

2:1

1:2

Depends on reaction formula

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Coefficients are used in mole ratios instead of subscripts because they indicate the relative number of molecules or moles involved in a reaction, while subscripts represent the fixed composition of a compound.

They indicate the relative number of molecules or moles involved in a reaction

They represent the fixed atomic composition of a molecule

They can be changed arbitrarily to balance equations

They denote the number of atoms in a molecule and are immutable

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Balanced Chemical Equation: Explain how conservation of mass allows you to interpret a balanced chemical equation in terms of mass.

It shows that the total mass of reactants equals the total mass of products.

It proves that mass is created in a reaction.

It indicates that mass is irrelevant in chemical equations.

It suggests that the mass of reactants is less than the mass of products.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Write the mole ratios for this reaction that relate ammonium chromate to the products.

1 mole of ammonium dichromate decomposes to produce 1 mole of nitrogen gas, 1 mole of chromium(III) oxide, and 4 moles of water vapor.

1 mole of ammonium chromate produces 1 mole of nitrogen gas, 2 moles of chromium(III) oxide, and 3 moles of water vapor.

1 mole of ammonium chromate gives 2 moles of nitrogen gas, 1 mole of chromium(III) oxide, and 4 moles of water vapor.

1 mole of ammonium chromate yields 1 mole of nitrogen gas, 1 mole of chromium(III) oxide, and 2 moles of water vapor.

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