Mole Conversions

Front

What is the definition of a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance, defined as containing exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

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 number of moles from mass?

Back

Number of moles = Mass (g) / Molar mass (g/mol).

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of particles in one mole of a substance.

Front

How do you convert moles to molecules?

Back

To convert moles to molecules, multiply the number of moles by Avogadro's number: Molecules = Moles x 6.022 x 10^23.

Front

What is the formula to find the mass of a substance from moles?

Back

Mass (g) = Moles x Molar mass (g/mol).

Front

How many grams are in 2.5 moles of NaCl? (Molar mass of NaCl = 58.44 g/mol)

Back

Mass = 2.5 moles x 58.44 g/mol = 146.1 g.

Front

What is the mass of 1 mole of water (H2O)?

Back

The molar mass of water (H2O) is approximately 18.02 g/mol.

Front

How do you find the number of moles from the number of molecules?

Back

Number of moles = Number of molecules / Avogadro's number.

Front

What is the molar mass of Cl2?

Back

The molar mass of Cl2 is 71.0 g/mol.