0.45g of an organic compound containing carbon, hydrogen and oxygen on complete combustion gave 0.44g. of CO2 and 0.09g. of H2O . The percentage of oxygen by weight in that compound is
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a
89.5
b
83.23
c
78.45
d
71.12
answer is D.
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Detailed Solution
%C=1244×Wt of CO2WtO.C×100=26.66 %H=218×Wt of H2OWtO.C×100=2.22 % O=100−(%C+%H)=71.12