Aspirin is a compound with the molecular formula C9H89O4. what is it's percentage composition?

Answer 1

Percent composition is the relative percentage of each element in the compound of interest.

C9H8O4 has a molar mass (total mass) = 180.16 g / mole

g C = 9 C x 12.01 g/ C = 108.09 g C

g H = 8 H x 1.01 g/ H = 8.08 g H

g O = 4 O x 15.999 = 63.996 g O

%C = 108.09 g / 180.16 g (x100%) = 60.00%

%H = 8.08 g / 180.16 g (x100%) = 4.48%

%O = 63.996 g / 180.16 g (x100%) = 35.52%