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Mole Concept & Avogadro Number

The percentag...

Question

The percentage of carbon in a molecule of carbon monoxide is

A

42.85 %

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B

22.43 %

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C

40.32 %

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D

33.61 %

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Solution

The correct option is A
$42.85 %$
Molecular mass of carbon monoxide = 28 u

Mass of 1 atom of carbon = 12 u

Percentage of carbon in one molecule of CO

$= \frac{Mass of carbon in one molecule of CO}{Mass of one molecul of CO} \times 100 = \frac{12}{28} \times 100 = 42.85 %$

Hence, the correct answer is option (a).

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