Stoichiometry Fall 2023

Front

What is the molar mass of C2H4O2?

Back

60 g/mol

Front

How many moles of CaCl2 will form from 250 moles Ca(ClO3)2?

Back

250 mole CaCl2

Front

Why do chemists use an excess of one reactant in a chemical reaction?

Back

The reaction will continue until all of the limiting reactant is consumed.

Front

How many grams are in 7.8 moles of NaCl?

Back

452 grams

Front

Using the equation Fe2O3 + 3 H2 → 2 Fe + 3 H2O, how many moles of Fe can be made from 6 moles H2?

Back

4 moles Fe

Front

Define stoichiometry.

Back

Stoichiometry is the calculation of reactants and products in chemical reactions.

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is totally consumed when the chemical reaction is complete.

Front

What is the purpose of a balanced chemical equation?

Back

A balanced chemical equation ensures that the same number of each type of atom appears on both sides of the equation.

Front

How do you calculate the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of NaCl?

Back

58.44 g/mol