One-Step Molar Conversions

Front

What is the first step in any molar conversion problem?

Back

Start with the given and its units.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which represents the number of molecules in one mole of a substance.

Front

How do you convert moles of a substance to molecules?

Back

Multiply the number of moles by Avogadro's number (6.02 x 10^23).

Front

How do you convert molecules of a substance to moles?

Back

Divide the number of molecules by Avogadro's number (6.02 x 10^23).

Front

What is the molar mass of H2O?

Back

The molar mass of H2O is 18 g/mol.

Front

How do you convert grams of a substance to moles?

Back

Divide the mass in grams by the molar mass of the substance.

Front

How do you convert moles of a substance to grams?

Back

Multiply the number of moles by the molar mass of the substance.

Front

What is the formula to find the number of grams from moles?

Back

Grams = Moles x Molar Mass.

Front

What is the formula to find the number of moles from grams?

Back

Moles = Grams / Molar Mass.

Front

If you have 3.76 mol of CO2, how many grams do you have?

Back

3.76 mol CO2 x 44 g/mol = 165.44 grams CO2.