Mole and Avogadro number, Molar Mass (21Q)

Front

What is the definition of molar mass?

Back

Molar mass is the number of grams per one mole of a substance.

Front

Molar mass is in units of ________.

Back

grams/mole.

Front

How many moles are in 32 grams of Oxygen (O)?

Back

2 moles.

Front

What is Avogadro's Number?

Back

6.02 x 10^23.

Front

What is the molar mass of NaCl?

Back

58.45 g/mol.

Front

What does Avogadro's Number represent?

Back

The number of particles in one mole of a substance.

Front

How do you calculate the number of moles from mass?

Back

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

Front

What is the molar mass of water (H2O)?

Back

18.02 g/mol.

Front

What is the significance of the mole in chemistry?

Back

The mole is a counting unit used to measure the amount of substance.

Front

How many grams are in 3 moles of NaCl?

Back

3 moles x 58.45 g/mol = 175.35 g.