Moles and Mole Conversions

Front

What is a mole in chemistry?

Back

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

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all the atoms in the compound's formula, expressed in grams per mole (g/mol).

Front

What is the relationship between moles and mass?

Back

The mass of a substance in grams is equal to the number of moles multiplied by the molar mass (mass = moles x molar mass).

Front

How many atoms are in one mole of a substance?

Back

One mole of any substance contains 6.022 x 10^23 atoms, molecules, or particles.

Front

What is the molar mass of carbon (C)?

Back

The molar mass of carbon is approximately 12.01 g/mol.

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

What is the molar mass of water (H2O)?

Back

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

Front

How do you find the number of molecules in a given number of moles?

Back

To find the number of molecules, multiply the number of moles by Avogadro's number (6.022 x 10^23).

Front

What is the mass of 2 moles of sodium chloride (NaCl)?

Back

The mass of 2 moles of NaCl is approximately 116.88 grams (2 moles x 58.44 g/mol).

Front

How many moles are in 58.44 grams of NaCl?

Back

There is 1 mole of NaCl in 58.44 grams (mass = moles x molar mass).