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 balanced equation for the reaction of aluminum with hydrochloric acid?

Back

2Al + 6HCl → 2AlCl3 + 3H2

Front

How many liters of hydrogen gas are produced from 2 moles of aluminum?

Back

3 moles of H2 are produced, which is 67.2 L at STP.

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is 18 g/mol.

Front

What is the mole ratio of H2 to O2 in the reaction 2H2 + O2 → 2H2O?

Back

The mole ratio is 2:1.

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all the atoms in the compound's formula.

Front

What is the molar mass of (NH4)2CO3?

Back

The molar mass is 96 g/mol.

Front

What coefficients balance the reaction KNO3 → KNO2 + O2?

Back

2, 2, 1.

Front

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

Back

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

Front

How many grams of H2O can be produced from 3.91 g of O2?

Back

4.4 g of H2O can be produced.