
Chapter 10 Stoichiometry Chapter Practice

Quiz
•
Chemistry
•
10th Grade
•
Hard
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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