Stoichiometry Review Worksheet

How many moles of potassium oxide are produced by the reaction of 4.11 g of potassium with excess oxygen?

_____K + ____ O₂ 🡪 _____ K₂O

Calcium carbonate reacts with phosphoric acid to produce calcium phosphate, carbon dioxide, and water according to the following unbalanced reaction. How many liters of carbon dioxide are produced when 4.75 g of CaCO3 reacts with an excess of phosphoric acid?

3CaCO3 + 2H3PO4 → Ca3(PO4)2 + 3CO2 + 3H2O

Carbon monoxide combines with oxygen to form carbon dioxide. How many liters of oxygen are needed to completely oxidize 52.0 L of carbon monoxide gas at STP?

_____CO + _____O2 →____CO2