Stoichiometry Practice Quiz

Calculate the molar mass of Mg(OH)_2.

In the image, which reactant is limiting?

How many carbons are present on the reactant side?

What is the number of moles in 22 grams of carbon dioxide ( $$CO_2$$ )? (Molar mass of $$CO_2$$ = 44 g/mol)

How many grams are in 2 moles of sodium chloride ( $$NaCl$$ )? (Molar mass of $$NaCl$$ = 58.44 g/mol)

In the reaction $$2H_2 + O_2 \rightarrow 2H_2O$$ , if you start with 4 moles of $$H_2$$ and 2 moles of $$O_2$$ , which is the limiting reactant?

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

How many grams of $$H_2O$$ are produced when 2 moles of $$O_2$$ react completely according to the equation $$2H_2 + O_2 \rightarrow 2H_2O$$ ? (Molar mass of $$H_2O$$ = 18 g/mol)

What is the molar mass of calcium carbonate ( $$CaCO_3$$ )?

In the balanced chemical equation $$N_2 + 3H_2 \rightarrow 2NH_3$$ , how many moles of $$H_2$$ are required to react completely with 1 mole of $$N_2$$ ?