0.30 g of a substance gives 0.88 g of carbon dioxide and 0.54 g water. Calculate the percentage of carbon and hydrogen in it.

Explanation

Weight of organic compound = 0.30 g
Weight of carbon dioxide = 0.88 g
Weight of water = 0.54 g
Percentage of hydrogen:
18 g of water contains 2 g of hydrogen
`:. "0.54 g of water contain"=(2)/(18) xx 0.54g` of hydrogen
`:. "% of hydrogen"=(2)/(18) xx (0.54)/(0.30) xx 100=(2)/(18) xx (54)/(0.3)`
`% of H=0.111 xx 180=19.888=20%`
Percentage of carbon:
44 g of `CO_(2)` contains 12 g of carbon
`"0.88 g of" CO_(2) "contains"=(12)/(44) xx 0.88 "g of carbon"`
`:. "% of carbon"=(12)/(44) xx (0.88)/(0.30) xx 100=(12)/(44) xx (88)/(0.3)=(24)/(0.3)`
% of carbon= 80%