Which of the following represents the formula of a substance which contains 50% oxygen ?

N_{2} O

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C O_{2}

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N O_{2}

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C H_{3} O H

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Solution

The correct option is D $C H_{3} O H$
Mass of $O$ in $C H_{3} O H = 1 \times 16 u$

Mass of $C H_{3} O H = 32 u$

Mass % of $O = \frac{M a s s o f O}{M a s s o f C H_{3} O H} \times 100 = \frac{16}{32} \times 100 = 50 %$ .

So, option D is correct.

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