Moles to Mass and Molar Mass

Front

What is the molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all the atoms in the compound's formula.

Front

What are the units for molar mass?

Back

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

Front

What is the molar mass of water (H₂O)?

Back

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

Front

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

Back

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

Front

What is the molar mass of magnesium fluoride (MgF₂)?

Back

The molar mass of magnesium fluoride is approximately 62 g/mol.

Front

What is the relationship between moles and mass?

Back

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

Front

What is the mass of 2 moles of sodium chloride (NaCl)?

Back

The molar mass of NaCl is approximately 58.5 g/mol, so 2 moles would have a mass of 117 g.

Front

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

Back

H₂O has the smallest molar mass.

Front

What is the mass of 0.35 moles of Zn(C₂H₃O₂)₂?

Back

The molar mass of Zn(C₂H₃O₂)₂ is approximately 184 g/mol, so 0.35 moles would have a mass of about 64.4 g.