Molar Mass Honors

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass of a compound, add together the molar masses of each element in the compound, multiplied by the number of times each element appears in the formula.

Front

What is the molar mass of potassium hydroxide (KOH)?

Back

56 g/mol

Front

What is the molar mass of uranium hexafluoride (UF6)?

Back

352 g/mol

Front

What is the molar mass of sodium hydroxide (NaOH)?

Back

40 g/mol

Front

What is the mass of one mole of aluminum (Al)?

Back

27 g

Front

How many particles are in one mole of a substance?

Back

6.02 x 10^23 particles (Avogadro's number).

Front

What is the significance of Avogadro's number?

Back

Avogadro's number is the number of atoms, molecules, or particles in one mole of a substance, which allows for the conversion between moles and number of particles.

Front

What is the molar mass of water (H2O)?

Back

18 g/mol

Front

How do you find the molar mass of a diatomic molecule like O2?

Back

For diatomic molecules, multiply the atomic mass of the element by 2. For O2, it is 16 g/mol x 2 = 32 g/mol.