Question

The percentage of deuterium in heavy water is:

• A. $22.2$
• B. $11.2$
• C. $44$
• D. $20$

Answer 1

Answer: (D)

$20$

Molecular mass of $D_{2}O$ is $20$ and of $D_2$ is $4$.

$D\%=\frac{4}{20}\times 100=20$.