The Mole and Molar Mass

Front

What is Avogadro's number?

Back

6.02 x 10^23 particles per one mole of a substance.

Front

How many atoms are in 1 mole of any substance?

Back

1 mole of any substance contains the same number of atoms, which is Avogadro's number.

Front

What is molar mass?

Back

The mass of a mole of atoms.

Front

What is the definition of molar mass?

Back

Number of grams per one mole of a substance.

Front

What is the mass of 1 mole of carbon (C)?

Back

12 g.

Front

How do you calculate the molar mass of a compound?

Back

Add the molar masses of all the elements in the compound.

Front

What is the mass of 2.50 mol of oxygen gas (O2)?

Back

80 g.

Front

If you have 3 moles of sodium (Na), how many grams do you have?

Back

Approximately 69 g (molar mass of Na is 23 g/mol).

Front

What is the relationship between moles and mass?

Back

Mass (g) = Moles × Molar Mass (g/mol).

Front

What is the molar mass of water (H2O)?

Back

18 g/mol.