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 carbon
44 g of carbondioxide contains, carbon = 12 g
`"0.88 g of carbon dioxide contains, carbon"=(12xx0.88)/(44)g`
`"0.30 g substance contains, carbon"=(12xx0.88)/(44)g`
`"100 g substance contains"`
`=(12xx0.88)/(44)xx(100)/(0.30)="80 g of carbon"`
Percentage of carbon = 80
Percentage of hydrogen
18 g of water contains, hydrogen `=2g`
`"0.54 g of water contains, hydrogen"=(2xx0.54)/(18)g`
`"0.30 g of substance contains hydrogen"=(2xx0.54)/(18xx0.30)g`
`"100 g of substance contains"=(2xx0.54)/(18xx0.30)xx100g`
= 20 g of hydrogen
Percentage of hydrogen = 20