0.378 g of an organic acid gave on combustion 0.264 g of carbon dioxide and 0.162 g of water vapour . Calculate the percentage of C and H.

0.378 g of an organic acid gave on combustion 0.264 g of carbon dioxid

1.	0.378 g of an organic acid gave on combustion 0.264 g of carbon dioxide and 0.162 g of water vapour . Calculate the percentage of C and H.
Answer» Solution :MASS of ORGANIC compound =0.378 g Mass of `CO_(2)` formedc =0.264 g Mass of `H_(2)O` formed=0.162 g (i) PERCENTAGE of carbon 44 g of `CO_(2)` contains carbon =12 g 0.264 g of `CO_(2)` contains carbon =`12/44 xx 0.264 =0.072 g ` Percentage of hydrogen 18 g of `H_(2)O` contains hydrogen = 2g 0.16.2 of `H_(2)O` contains hydrogen =`2/18xx0.162 =0.018 g ` Percentage of hydrogen =`0.018/0.378 xx100 =4.76 % `