1.

0.2475g of an organic compound gave on combustion 0.4950 of `CO_(2)` and 0.2025g of `H_(2)O` calculate the % of C `&` H in it.

Answer» Wt of organic compound (w)=0.2475g
Wt of `CO_(2)(b)=0.4950g`
Wt. of `H_(2)O(a)=0.2025g`
% of `C=((12)/(44)xxb)/(w)xx100`
`=((12)/(44)xx0.4950)/(0.2475)xx100=54.54`
% of `H=((2)/(18)xxa)/(w)xx100`
`=((2)/(18)xx0.2025)/(0.2475)xx100=9.09`


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