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  4. The percentage of oxygen in NaOH is

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Q. The percentage of oxygen in $NaOH$ is

AIIMSAIIMS 1996Some Basic Concepts of Chemistry

Solution:

Molecular weight of $NaOH$ is $40$

Atomic weight of oxygen is $16$

$\Rightarrow \,\,\,\,\,$ Percentage of oxygen $=\frac{16}{40} \times 100 $

$=40 \%$