Question

An Avogadro’s number (1 mol) of sugar molecules has a mass of 342 g, but an Avogadro’s number (1 mol) of water molecules has a mass of only 18 g. Explain why there is such a difference between the mass of 1 mol of sugar and the mass of 1 mol of water.

Answer 1

molecular formula of water isH2O

2H+(O)

2+16

18

molecular formula of sugar is C12 H22O11

12(C)+22(H)+11(O)

12×12 +22+11×16

144+22+176

342g