Stoichiometry Review

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 conservation of mass.

Front

What is the molar mass of (NH₄)₂CO₃?

Back

96 g

Front

Using the equation Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l), how many moles of iron can be made from 6 moles H₂?

Back

4 moles Fe

Front

How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

Back

6.85 mol

Front

What is the balanced equation for the reaction: RbNO₃ + BeF₂ → Be(NO₃)₂ + RbF?

Back

2 RbNO₃ + 1 BeF₂ → 1 Be(NO₃)₂ + 2 RbF

Front

What are mole ratios?

Back

Mole ratios are the ratios of the amounts in moles of any two compounds involved in a chemical reaction, derived from the coefficients of the balanced chemical equation.

Front

What is the first step in stoichiometric calculations?

Back

The first step is to write a balanced chemical equation for the reaction.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula.

Front

What is the significance of the coefficients in a balanced equation?

Back

Coefficients indicate the number of moles of each substance involved in the reaction.

Front

What is the relationship between moles and mass?

Back

The relationship is given by the formula: mass (g) = moles × molar mass (g/mol).