The Mole and Molar Mass

Front

What is a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.02 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).

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula.

Front

What is the molar mass of sulfur dioxide (SO2)?

Back

The molar mass of SO2 is approximately 64 g/mol (32 g/mol for S and 16 g/mol for each O).

Front

How many grams are in 1 mole of water (H2O)?

Back

1 mole of water (H2O) has a mass of approximately 18 g.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles in one mole of a substance.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance.

Front

How many molecules are in 2 moles of carbon dioxide (CO2)?

Back

There are 1.204 x 10^24 molecules in 2 moles of CO2 (2 moles x 6.02 x 10^23 molecules/mole).

Front

What is the mass of 0.5 moles of sodium chloride (NaCl)?

Back

The mass of 0.5 moles of NaCl is approximately 29 g (58 g/mol x 0.5 moles).

Front

What is the relationship between moles and molecules?

Back

1 mole of any substance contains 6.02 x 10^23 molecules.