Molar Mass Practice

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, identify the number of each type of atom in the compound, multiply by the atomic mass of each element, and sum the total.

Front

What is the molar mass of Cu in Cu2O?

Back

The molar mass of Cu (Copper) is approximately 63.55 g/mol. In Cu2O, there are 2 Cu atoms, contributing 127.1 g/mol.

Front

What is the molar mass of O in Cu2O?

Back

The molar mass of O (Oxygen) is approximately 16.00 g/mol. In Cu2O, there is 1 O atom, contributing 16.00 g/mol.

Front

Calculate the molar mass of Cu2O.

Back

The molar mass of Cu2O = (2 x 63.55 g/mol) + (1 x 16.00 g/mol) = 143.10 g/mol.

Front

What is the molar mass of Cl in Cl2?

Back

The molar mass of Cl (Chlorine) is approximately 35.45 g/mol. In Cl2, there are 2 Cl atoms, contributing 70.90 g/mol.

Front

Calculate the molar mass of Cl2.

Back

The molar mass of Cl2 = 2 x 35.45 g/mol = 70.90 g/mol.

Front

What is the molar mass of N in NH4NO2?

Back

The molar mass of N (Nitrogen) is approximately 14.01 g/mol. In NH4NO2, there are 2 N atoms, contributing 28.02 g/mol.

Front

What is the molar mass of H in NH4NO2?

Back

The molar mass of H (Hydrogen) is approximately 1.01 g/mol. In NH4NO2, there are 4 H atoms, contributing 4.04 g/mol.

Front

Calculate the molar mass of NH4NO2.

Back

The molar mass of NH4NO2 = (2 x 14.01 g/mol) + (4 x 1.01 g/mol) + (2 x 16.00 g/mol) = 64.06 g/mol.