Mole Conversions Practice

Front

What is the definition of molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass of a compound, sum the molar masses of all the atoms in its chemical formula, taking into account the number of each type of atom.

Front

What is the molar mass of sodium chloride (NaCl)?

Back

The molar mass of sodium chloride (NaCl) is approximately 58.44 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 moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

How many moles are in 321.8 g of sodium chloride (NaCl)?

Back

There are approximately 5.507 moles of sodium chloride in a 321.8 g sample.

Front

What is the mass of 0.89 mol of calcium chloride (CaCl2)?

Back

The mass of 0.89 mol of calcium chloride (CaCl2) is 98.9 grams.

Front

How do you find the mass of a substance from the number of moles?

Back

To find the mass from the number of moles, multiply the number of moles by the molar mass of the substance.

Front

What is the mass of 9.76 x 10^22 formula units of strontium chloride (SrCl2)?

Back

The mass of 9.76 x 10^22 formula units of strontium chloride (SrCl2) is 25.7 grams.

Front

What is Avogadro's number and why is it important?

Back

Avogadro's number (6.022 x 10^23) is the number of particles (atoms, molecules, or formula units) in one mole of a substance, and it is essential for converting between moles and number of particles.