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 1H atoms are replaced by 2H atoms is :

Question

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 1H atoms are replaced by 2H atoms is : (A) 7.5 kg (B) 10 kg (C) 15 kg (D) 37.5 kg

Tardigrade Admin · Accepted Answer

Mass of hydrogen = (10/100) × 75=7.5 kg Replacing 1 H by 2 H would replace 7.5 kg with 15 kg ∴ Net gain =7.5 kg

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 $75 k g$ person would gain if all $^{1} H$ atoms are replaced by $^{2} H$ atoms is :

7.5 kg

10 kg

15 kg

37.5 kg

Mass of hydrogen $= \frac{10}{100} \times 75 = 7.5 k g$

Replacing $^{1} H$ by $^{2} H$ would replace $7.5 k g$ with $15 k g$

$∴$ Net gain $= 7.5 k g$

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 75kg person would gain if all 1H atoms are replaced by 2H atoms is :