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 (integer)
3
Solution
18 gm H<sub>2</sub>O $\Rightarrow$ 2 gm H<sub>2</sub><br><br>210 gm $\Rightarrow$ ${2 \over {18}} \times 210$<br><br>= 23.33 gm H<sub>2</sub><br><br>So, % H<sub>2</sub> = ${{23.33} \over {750}} \times 100$ = 3.11% $\approx$ 3%
About this question
Subject: Chemistry · Chapter: Some Basic Concepts of Chemistry · Topic: Mole Concept
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