Sulfur and oxygen combine to make sulfur dioxide. It takes ___ mol of sulfur to produce 641 g sulfur dioxide.

__ S8 + __ O2 → __ SO2

When 59.6 g heptane is burned it releases __ mol water.

__ C7H16 + __ O2 → __ CO2 + __ H2O

Calcium carbonate reacts with hydrochloric acid (HCl) to produce calcium chloride, water and carbon dioxide. You need to have 298 grams of carbon dioxide for another process, so you need to start with __ mol hydrochloric acid.

__ CaCO3 + __ HCl → __ CaCl2 + __ H2O + __ CO2

Ammonium hydroxide is neutralized by sulfuric acid to produce ammonium sulfate and water. It will make ___ mol ammonium sulfate when you neutralize 11.27 g ammonium hydroxide.

__ NH4OH + __ H2SO4 → __ (NH4)2SO4 + __ H2O