Moles, Mass, and Molarity

Front

What is the mass of 1 mole of chromium?

Back

The molar mass of chromium is approximately 51.996 g/mol.

Front

How do you convert from grams to moles?

Back

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

Front

What is molarity?

Back

Molarity (M) is a measure of concentration, defined as moles of solute per liter of solution.

Front

What is the formula for calculating molarity?

Back

Molarity (M) = moles of solute / liters of solution.

Front

What is a solute?

Back

A solute is the substance that is dissolved in a solution.

Front

What is a solvent?

Back

A solvent is the substance that dissolves the solute, typically present in greater amount.

Front

If you have 3 moles of NaCl, how many grams do you have?

Back

To find the mass, multiply the moles by the molar mass of NaCl (58.44 g/mol): 3 moles x 58.44 g/mol = 175.32 g.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, representing the number of particles in one mole of a substance.

Front

How do you find the number of moles from grams?

Back

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

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18.02 g/mol.