1. Tardigrade
  2. Question
  3. Chemistry
  4. The most abundant elements by mass in the body of a healthy human adult are: Oxygen (61.4 %), Carbon (22.9 %), Hydrogen ( 10.0 % ) and Nitrogen (2.6 %). The weight which a 75 kg person would gain if all 1 H atoms are replaced by 2 H atoms is

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Q. The most abundant elements by mass in the body of a healthy human adult are : Oxygen $(61.4 \%)$, Carbon $(22.9\%)$, Hydrogen ( $10.0 \%$ ) and Nitrogen $(2.6\%)$. The weight which a $75\, kg$ person would gain if all ${ }^{1} H$ atoms are replaced by ${ }^{2} H$ atoms is

Some Basic Concepts of Chemistry

Solution:

Weight of ${ }_{1}^{1} H$ in person $=75 \times \frac{10}{100}=7.5 \,kg$
Now if ${ }_{1} H ^{1}$ is replaced by ${ }_{1} H ^{2}$
Than person will gain weight by $=7.5 \,kg$