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, ions, etc.) of a substance.

Front

How many molecules are in one mole of any substance?

Back

6.02 x 10^23 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 convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

What is the molar mass of carbon (C)?

Back

The molar mass of carbon is 12.01 g/mol.

Front

How many moles are in 12 grams of carbon?

Back

1 mole (since 12 g / 12.01 g/mol = 1 mole).

Front

How do you find the number of atoms in a given mass of an element?

Back

To find the number of atoms, convert the mass to moles using the molar mass, then multiply by Avogadro's number.

Front

What is the mass of one mole of silver (Ag)?

Back

The mass of one mole of silver is 107.87 g.

Front

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

Back

0.05 moles (since 3.01 x 10^22 atoms / 6.02 x 10^23 atoms/mole = 0.05 moles).

Front

What is the mass of 4.98 x 10^24 atoms of zinc (Zn)?

Back

541 g (calculated using the number of moles and the molar mass of zinc).