Moles to grams and grams to moles

Front

What is a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

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

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 g/mol).

Front

What is the molar mass of calcium (Ca)?

Back

The molar mass of calcium is approximately 40.08 g/mol.

Front

Calculate the number of moles in 25.0 g of calcium.

Back

0.62 moles (25.0 g ÷ 40.08 g/mol).

Front

What is the molar mass of cobalt(II) nitrate, Co(NO3)2?

Back

The molar mass of Co(NO3)2 is approximately 182.9 g/mol.

Front

Calculate the mass of 0.84 moles of cobalt(II) nitrate.

Back

153.6 g (0.84 moles x 182.9 g/mol).

Front

Which compound has the highest number of moles in 20.0 g?

Back

LiCl has the most moles because it has the lowest molar mass.

Front

What is the molar mass of lithium chloride (LiCl)?

Back

The molar mass of LiCl is approximately 42.39 g/mol.

Front

Calculate the number of moles in 20.0 g of LiCl.

Back

0.47 moles (20.0 g ÷ 42.39 g/mol).