0.378 g of an organic acid gave on combu...

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.

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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 % `

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