1.

0.26 g of an organic compound gave 0.039 g of water and 0.245 g of carbon dioxide on combustion. Calculate the percentage of C & H.

Answer»

Solution :Weight of organic compound = 0.26 g
Weight of WATER = 0.039 g
Weight of `CO_(2)` =0.245 g
Percentage of HYDROGEN
18 g of water contains 2 g of hydrogen
`"0.039 g of water contains" =(2)/(18) xx (0.039)/(0.26) "of H"`
`:. % "of hydrogen"=(0.039)/(0.26) xx (2)/(18) xx 100=1.66%`
Percentage of CARBON
44g of `CO_(2)` contains 12 g of C
`0.245 "g of" CO_(2) "contains"=(12)/(44) xx (0.245)/(0.26) "g of C"`
`% "of Carbon"=(12)/(44) xx (0.245)/(0.26) xx 100=25.69%`


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