Stoichiometry & Reaction Types

Balance the combustion of propane: C3H8 + O2 → CO2 + H2O. What is the coefficient in front of O2 when balanced?

How many moles of H2O are produced when 2.0 mol of O2 reacts with excess H2 according to $2H_2 + O_2 \rightarrow 2H_2O$?

In the reaction $2Al + 3Br_2 \rightarrow 2AlBr_3$, if you start with 1.50 mol Al and 1.00 mol Br2, which is the limiting reagent?

A reaction has a theoretical yield of 12.0 g and an actual yield of 9.00 g. What is the percent yield?

Which reaction type best describes $Zn + 2HCl \rightarrow ZnCl_2 + H_2$?

When solving stoichiometry problems, which step is correct after writing a balanced equation?

If two reactants are present and one is in excess, the reactant with the smaller initial number of moles is always the limiting reagent.

Percent yield can exceed 100% if the product is impure or contains solvent.

A balanced chemical equation conserves both mass and number of atoms for each element.

Explain how to determine the limiting reagent given masses of two reactants.

Match each reaction type to its balanced example: