Problem:

1. Determine the molecular mass of glucose C₆H₁₂O₆, which is also known as blood sugar
2. Determine the molecular mass of naphthalene C₁₀H₈, which is used in mothballs

Problem solving strategy:

Multiply atomic masses of carbon, hydrogen and oxygen by their subscripts and add

Solution:

1. Molecular mass of C₆H₁₂O₆ = 6(12.00). 12(1,008) + 6(16.00) = 180.096 amu

2. Molecular mass of C₁₀H₈ = 12 x 10 + 1 x 8 = 120 + 8 = 128 amu