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Percentage Composition

In a gaseous ...

Question

In a gaseous mixture 2mol of ${C O}_{2}$ , 1 mol of $H_{2}$ and 2 mol of He are present than determine mole percentage of ${C O}_{2}$ .

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Solution

Moles of ${C O}_{2}, H_{2}$ $H e$ respectively $2, 1, 2$
mole percentage of ${C O}_{2} = \frac{2}{2 + 1 + 2} = \frac{2}{5} = 0.4 \times 100 = 40$ %
$∴$ Mole percentage of ${C O}_{2}$ is $40$ %

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