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

Explanation

(i) 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 water contains 2 g of hydrogen
`:." 0.54" g"` of water contain `=2/(18)xx0.54g` of hydrogen
`:." "%` of hydrogen `=2/(18)xx(0.54)/(0.30)xx100=(2)/(18)xx(54)/(0.3)`
`" "%` of H = `0.111xx180=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)xx0.88g` of carbon
`:." "%` of carbon `=(12)/(44)xx(88)/(0.3)=(24)/(0.3)`
`" "%` of carbon `=80%`
(ii)