0.01 mole of an organic compound $(X)$ containing 10% hydrogen, on complete combustion produced 0.9 g $\mathrm{H_2O}$. Molar mass of $(X)$ is ______ $\mathrm{g\,mol^{-1}}$.

Question

Dr. Abubacker · Accepted Answer

[Solution by Dr. Abubacker] 0.9 g of water is $0.05$ mol, containing $0.1$ mol (0.1 g) of H, all from $0.01$ mol of $X$. So 1 mol of $X$ contains $10$ g of H, which is 10% of its mass: $M=\frac{10}{0.10}=100\ \mathrm{g\,mol^{-1}}$. Answer: 100.

Q. 0.01 mole of an organic compound $(X)$ containing 10% hydrogen, on complete combustion produced 0.9 g $\mathrm{H_2O}$. Molar mass of $(X)$ is ______ $\mathrm{g\,mol^{-1}}$.

Explanation

Reviewed by Dr. Abubacker

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