Determine the % for sucrose, C12H22O11, more commonly known as table sugar.

Question

Find % composition of sucrose

Answer 1

% composition of C₁₂H₂₂O₁₁

molar mass C₁₂H₂₂O₁₁ = 12C+22H+11O_xygen

molar mass=12(12.01)+22(1.01)+11(16.00)=342.34 g/mol

%C=(mass 12 atoms C / mass C₁₂H₂₂O₁₁)100

%C=(12*12.01/342.34)100

=42.1%

%H=(mass 22 H atoms / mass C₁₂H₂₂O₁₁)100

%H=(22*1.01/342.34)100

=6.49%

%O=100-%C-%H

%O=100-42.1-6.49

=51.4%