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%