Ans :
The molar mass of the compound C7H14O is 114.18 g/mol
Atomic mass of C is 12.01 g/mol , H is 1.01 g/mol and of O is 16.00 g/mol
so mass of C in one mol compound = 7 mol x 12.01 g/mol = 84.07 g
mass of H in one mol = 14 mol x 1.01 g/mol = 14.11 g
mass of O in one mol = 1 mol x 16.00 g/mol = 16.00 g
mass percentage = ( mass of element in one mole / molar mass) x 100
so here :
mass percentage C :
= (84.07 g / 114.18 g) x 100
= 73.6 %
Mass percentage H :
= (14.11 g / 114.18 g) x 100
= 12.4 %
Mass percentage O :
= (16.00 g / 114.18 g ) x 100
= 14.0 %
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