What is the mass percentage of hydrogen in the H 2 O molecule-A- 33-33 -B- 22-22 -C- 11-11 -D- 5-55 -

The correct option is C 11.11 Let us consider 1 molecule of H_2O nbsp; Mass of hydrogen in 1 molecule of H_2O nbsp;= 2 g Mass of oxygen in 1 molecule of H ...

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Standard VII

Chemistry

Conservation of Mass

What is the m...

Question

What is the mass percentage of hydrogen in the H₂O molecule?

5.55%

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11.11%

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33.33%

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22.22%

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Solution

The correct option is B
11.11%

Let us consider 1 molecule of $H_{2} O$

Mass of hydrogen in 1 molecule of $H_{2} O$ = $2 g$

Mass of oxygen in 1 molecule of $H_{2} O$ = $16 g$

Therefore, total mass of 1 molecule of $H_{2} O$ = $2 + 16$ = $18 g$

Now percentage of hydrogen is given by:

= $\frac{Mass of hydrogen in 1 molecule of H_{2} O}{Total mass of 1 molecule of H_{2} O}$

= $\frac{2}{18} \times 100 = 11.11$ %

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What is the mass percentage of hydrogen in the H2O molecule?

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