U2, T3, Problem Set #2

Problem Set #2

Determine the molar mass of ammonia, NH₃ in g/mol.

Molar Mass of NH₃ = 1N + 3H

Molar Mass of NH₃ = 1 (14.01 g/mol) + 3 ( 1.01 g/mol)

Molar Mass of NH₃ = 17.04 g/mol

Determine the molar mass of glucose, C₆H₁₂O₆ in g/mol.

Molar Mass of C₆H₁₂O₆ = 6C + 12H + 6O

Molar Mass of C₆H₁₂O₆ = 6 (12.01 g/mol) + 12 (1.01 g/mol) + 6 (16.00 g/mol)

Molar Mass of C₆H₁₂O₆ = 180.18 g/mol

Determine the molar mass of potassium dichromate, K₂Cr₂O₇ in g/mol.

Molar Mass of K₂Cr₂O₇ = 2K + 2Cr + 7O

Molar Mass of K₂Cr₂O₇ = 2 (39.10 g/mol) + 2 (52.00 g/mol) + 7 (16.00 g/mol)

Molar Mass of K₂Cr₂O₇ = 294.20 g/mol

Determine the molar mass of iron (III) sulphate, Fe₂(SO₄)₃ in g/mol.

Molar Mass of Fe₂(SO₄)₃ = 2Fe + 3S + 12O

Molar Mass of Fe₂(SO₄)₃ = 2 (55.85 g/mol) + 3 (32.07 g/mol) + 12 (16.00 g/mol)

Molar Mass of Fe₂(SO₄)₃ = 399.91 g/mol