Module 10 Review

In stoichiometry, chemists are mainly concerned with

• energy changes that occur in reactions

• the types of bonds found in a compound

• mass relationships in a chemical reaction

• the speed of a chemical reaction

What can coefficients in a balanced chemical equation represent? Select all that are true.

• number of atoms

• moles

• molecules

• mass

• formula units

Tags

NGSS.HS-PS1-7

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, they are calculating the

• percent yield

• mole ratio

• actual yield

• theoretical yield

Stoichiometry is based on the law of

• conservation of mole

• multiple proportions

• conservation of mass

• definite proportions

Tags

NGSS.HS-PS1-7

If a chemical reaction involving substance A and B stops when substance B is completely used up, substance B is referred to as the

• primary reagent

• limiting reagent

• excess reagent

• primary product

If a chemical reaction involving substance A and B stops when substance B is completely used up, substance A is referred to as the

• primary reagent

• limiting reagent

• excess reagent

• primary product

Which of the following is correctly balanced?

• 1 S + 1 O₂ --> 1 SO₂

• 1 S + 2 O₂ --> 2 SO₂

• 2 S + 1 O₂ --> 1 SO₂

• 2 S + 2 O₂ --> 2 SO₂

Tags

NGSS.MS-PS1-5

Given 6 grams of sulfur and 10 liters of oxygen, what is the limiting reagent?

1 S + 1 O₂ --> 1 SO₂

• Oxygen

• Sulfur

Tags

NGSS.HS-PS1-7

Given 0.1875 mol S, what amount of grams of SO₂ can be produced?

1 S + 1 O₂ --> 1 SO₂

• 12.01 g

• 64.06 g

• 9.004 g

• 341.7 g

Tags

NGSS.HS-PS1-7

If 25 grams of a product is actually collected, but was predicted to have a yield of 29 grams, what is the percent yield?

• 86%

• 116%

• 0.86%

• 1.16%