Molar Conversions Review

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 many atoms are in one mole of any substance?

Back

One mole of any substance contains 6.022 x 10^23 atoms.

Front

What is the molar mass of iron (Fe)?

Back

The molar mass of iron (Fe) is approximately 55.85 g/mol.

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 formula to calculate the number of particles from moles?

Back

Number of particles = Moles x 6.022 x 10^23.

Front

If you have 2 moles of CO2, how many molecules do you have?

Back

You have 2 x 6.022 x 10^23 = 1.2044 x 10^24 molecules of CO2.

Front

What is the mass of one mole of sulfur (S)?

Back

The mass of one mole of sulfur (S) is approximately 32.07 grams.

Front

How do you convert moles to particles?

Back

To convert moles to particles, multiply the number of moles by 6.022 x 10^23.

Front

What is the mass of one mole of potassium (K)?

Back

The mass of one mole of potassium (K) is approximately 39.10 grams.

Front

How many grams are in 3 moles of water (H2O)?

Back

3 moles of water (H2O) = 3 x 18.02 g/mol = 54.06 grams.