Stoichiometry Practice Quiz

Calculate the molar mass of Mg(OH)_2.

• 33.2 g/mol

• 41.3 g/mol

• 86.9 g/mol

• 58.3 g/mol

In the image, which reactant is limiting?

• The white molecules, because there are extra.

• The black atoms, because they are completely used up.

• The white molecules, because they are completely used up.

• The black atoms, because there are extra.

Tags

NGSS.HS-PS1-7

How many carbons are present on the reactant side?

• 1

• 2

• 3

• 4

• 0.5 moles

• 1 mole

• 2 moles

• 0.25 moles

Tags

NGSS.HS-PS1-7

• 29.22 grams

• 58.44 grams

• 116.88 grams

• 232.76 grams

• Both are in the correct proportions

• Neither, as there is excess of both

What is the percent yield of a reaction if 20 grams of product are actually produced, but the theoretical yield is 25 grams?

• 80%

• 125%

• 20%

• 25%

Tags

NGSS.HS-PS1-7

• 18 grams

• 36 grams

• 72 grams

• 144 grams

Tags

NGSS.HS-PS1-7

• 40.08 g/mol

• 60.01 g/mol

• 100.09 g/mol

• 120.10 g/mol

• 1 mole

• 2 moles

• 3 moles

• 6 moles