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Question

Number of hydrogen molecules present in 3 moles of hydrogen is______.

A
18.069×1022
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B
18.069×1023
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C
18.069×1020
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D
18.069×1021
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Solution

The correct option is B 18.069×1023
1 mole of hydrogen contains 6.023×1023 molecules.
Therefore, 3 moles of hydrogen contains:
3×6.023×1023
=18.069×1023 molecules
Three moles of hydrogen contains =18.069×1023 molecules.

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