JEE MAIN - Chemistry (2021 - 16th March Morning Shift - No. 16)
Complete combustion of 750 g of an organic compound provides 420 g of CO2 and 210 g of H2O. The percentage composition of carbon and hydrogen in organic compound is 15.3 and ___________ respectively. (Round off to the Nearest Integer).
Answer
3
Explanation
18 gm H2O $$ \Rightarrow $$ 2 gm H2
210 gm $$ \Rightarrow $$ $${2 \over {18}} \times 210$$
= 23.33 gm H2
So, % H2 = $${{23.33} \over {750}} \times 100$$ = 3.11% $$ \approx $$ 3%
210 gm $$ \Rightarrow $$ $${2 \over {18}} \times 210$$
= 23.33 gm H2
So, % H2 = $${{23.33} \over {750}} \times 100$$ = 3.11% $$ \approx $$ 3%
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