Stoichiometry Review First

Front

What is stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the balanced chemical equations.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

What is the mole ratio in a chemical reaction?

Back

The mole ratio is the ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

How do you calculate moles from grams?

Back

Moles can be calculated using the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.

Front

What is an excess reactant?

Back

An excess reactant is a substance that is not completely used up in a chemical reaction, remaining after the reaction has finished.

Front

How many moles of CO2 are produced from 110 g of CH4?

Back

6.85 mol of CO2 are produced from the combustion of 110 g of CH4.

Front

What is the mole ratio of Mg to Fe in the reaction 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe?

Back

The mole ratio of Mg to Fe is 3 mol Mg / 2 mol Fe.

Front

Where do mole ratios come from?

Back

Mole ratios are obtained from the balanced chemical equation.

Front

How many grams of potassium nitrate are needed to react with 0.901 moles of sulfuric acid?

Back

182 grams of potassium nitrate are needed to react with 0.901 moles of sulfuric acid.