Moles and Mole Conversions

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, etc.). This number is known as Avogadro's number.

Front

How many atoms are in one mole of any substance?

Back

One mole of any substance contains 6.02 x 10^23 atoms or molecules.

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 calculate the number of moles from the number of atoms?

Back

To calculate the number of moles from the number of atoms, divide the number of atoms by Avogadro's number (6.02 x 10^23).

Front

How many moles are in 3.01 x 10^22 atoms of magnesium?

Back

0.05 moles.

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 (in grams per mole).

Front

How many grams are in 1.2 moles of neon (Ne)?

Back

24 grams.

Front

What is the molar mass of oxygen (O)?

Back

The molar mass of oxygen is approximately 16 grams per mole.

Front

How many molecules are in 31.8 moles of water?

Back

1.9 x 10^25 molecules.

Front

What is the relationship between moles and molecules?

Back

The number of molecules can be found by multiplying the number of moles by Avogadro's number (6.02 x 10^23).