Molar Mass

Front

What is molar mass?

Back

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

Front

What are the units for molar mass?

Back

The units for molar mass are grams per mole (g/mol).

Front

Which compound has the smallest molar mass: CO, CO₂, H₂O, or H₂O₂?

Back

H₂O has the smallest molar mass.

Front

How many moles of atoms are in 1 mole of CO₂?

Back

There are 3 moles of atoms in 1 mole of CO₂.

Front

Which has a greater mass: 1 mole of scandium or 2 moles of boron?

Back

1 mole of scandium has a greater mass.

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water (H₂O) is approximately 18 g/mol.

Front

What is the molar mass of carbon dioxide (CO₂)?

Back

The molar mass of carbon dioxide (CO₂) is approximately 44 g/mol.

Front

How do you calculate the percentage composition of an element in a compound?

Back

Percentage composition = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

Find the percentage composition of Mg in Mg₃(PO₄)₂.

Back

The percentage composition of Mg in Mg₃(PO₄)₂ is 27.75%.

Front

What is the molar mass of magnesium (Mg)?

Back

The molar mass of magnesium (Mg) is approximately 24.31 g/mol.