Grams to Moles and Moles to Grams

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

How do you convert moles to grams?

Back

To convert moles to grams, use the formula: Mass (g) = Moles x Molar Mass (g/mol).

Front

What is the molar mass of KNO3?

Back

The molar mass of KNO3 (Potassium Nitrate) is approximately 101.1 g/mol.

Front

Calculate the number of moles in 784 g of KNO3.

Back

Moles = 784 g / 101.1 g/mol = 7.8 mol.

Front

What is the molar mass of H2O?

Back

The molar mass of H2O (Water) is approximately 18.0 g/mol.

Front

Calculate the mass of 3.8 mol of H2O.

Back

Mass = 3.8 mol x 18.0 g/mol = 68.4 g.

Front

What is the molar mass of Au?

Back

The molar mass of Au (Gold) is approximately 197.0 g/mol.

Front

Calculate the mass of 3.6 mol of Au.

Back

Mass = 3.6 mol x 197.0 g/mol = 709.2 g.

Front

What is the molar mass of MgCl2?

Back

The molar mass of MgCl2 (Magnesium Chloride) is approximately 95.2 g/mol.