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Limiting Reagent or Reactant

An organic co...

Question

An organic compound weighing $0.244$ g on combustion with dry oxygen produces $0.616$ g of $C O_{2}$ and $0.108$ g of $H_{2} O$ . Determine the percentage composition of the oxygen in compound.

11.16

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26.23

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30.41

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25.66

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Solution

The correct option is B $26.23$ %
Mass of the organic compound taken = $0.244 g$
Mass of $C O_{2}$ formed = $0.616 g$
Mass of $H_{2} O$ formed = $0.108 g$

Mass of $C$ in $C O_{2}$ formed= $\frac{0.616 \times 12}{44} g$

Pecentage of $C$ in compound= $\frac{0.616 \times 12}{44} \times \frac{100}{0.244} = 68.85 %$

Mass of $H$ in $H_{2} O$ formed= $\frac{0.108 \times 2}{18} g$

Pecentage of $H$ in compound= $\frac{0.108 \times 2}{18} \times \frac{100}{0.244} = 4.92 %$

Percentage of $O$ in the compound = $100 - (68.85 + 4.92) = 26.23 %$

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An organic compound weighing 0.244 g on combustion with dry oxygen produces 0.616 g of CO2 and 0.108 g of H2O. Determine the percentage composition of the oxygen in compound.

An organic compound weighing $0.244$ g on combustion with dry oxygen produces $0.616$ g of $C O_{2}$ and $0.108$ g of $H_{2} O$ . Determine the percentage composition of the oxygen in compound.