Question

Combustion analysis of an unknown compound provides the following data: 73.5 grams C, 4.20 grams H, and 72.3 grams Cl. What is the percent composition of each element in this compound? 73.5% C, 4.20% H, 72.3% Cl 48.0% C, 3.00% H, 50.0% Cl 17.5% C, 1.00% H, 17.2% Cl 49.0% C, 2.80% H, 48.2% Cl

Answer 1

The % composition of each element is calculated as follows

= mass of the element/total mass x100

total mass= 73.5+4.2+72.3=150
% composition of C = 73.5/150 x100=49%

% composition of H= 4.2/150 x100= 2.8%

%composition of Cl= 72.3/150 x100= 48.2%