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 a mole ratio?

Back

A mole ratio is a ratio that shows the relative amounts of moles of reactants and products in a chemical reaction.

Front

In the reaction N2 + 3 H2 → 2 NH3, what is the mole ratio of N2 to NH3?

Back

1 mole N2 : 2 moles NH3.

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

The excess reactant is the substance that is not completely used up in a chemical reaction.

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, compare the mole ratio of the reactants used in the reaction to the mole ratio in the balanced equation.

Front

What is the mole ratio of water to oxygen in the reaction 4NH3 + 5O2 → 4NO + 6H2O?

Back

6 moles H2O : 5 moles O2.

Front

If 6.2 moles of H2 are used in the reaction N2 + 3 H2 → 2 NH3, how many moles of NH3 can be produced?

Back

4.13 moles NH3.

Front

What is the balanced equation for the combustion of C10H8?

Back

C10H8 + 12 O2 → 10 CO2 + 4 H2O.

Front

How do you calculate the number of moles from grams?

Back

To calculate moles from grams, use the formula: moles = mass (g) / molar mass (g/mol).