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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 H1 atoms are replaced by H2 atoms is:

A
37.5 kg
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B
7.5 kg
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C
10 kg
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D
15 kg
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