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InterviewSolution
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The most abundant elements by mas 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 isA. 15 kgB. 37.5 kgC. 7.5 kgD. 10 kg |
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Answer» Correct Answer - C Given, abundance of element by mass oxygen `= 61.4 %` carbon `= 22.9%` hydrogen `= 10%` and nitrogen `= 2.6%` Total weight of person `= 75 kg` Mass due to `.^(1)H = (75 xx 10)/(100) = 7.5 kg` `.^(1)H` atoms are replaced by `.^(2)H` atoms, Mass due to `.^(2)H = (7.5 xx 2) kg` `:.` Mass gain by person `= 7.5 kg` |
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