Question

The percentage of oxygen in $NaOH$ is

• A. 0.16
• B. 0.04
• C. 0.4
• D. 0.08

Answer 1

Answer: (C)

0.4

Answer 2

Molecular weight of $NaOH$ is $40$ Atomic weight of oxygen is $16$ $\Rightarrow \,\,\,\,\,$ Percentage of oxygen $=\frac{16}{40} \times 100$ $=40 \%$