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Some Basic Concepts of Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistrySome Basic Concepts of Chemistry2 Marks
Question
Vitamin C is known to contain $1.29 \times 10^{24}$ hydrogen atoms. Calculate the number of moles of hydrogen atoms.
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Answer

Number of moles of hydrogen $=\frac{\text{Number of atoms}}{6.022\times10^{23}}$
$=\frac{1.29\times10^{24}}{6.022\times10^{23}}$
$=\frac{12.9\times10^{23}}{6.022\times10^{23}}=2.14\text{mol}$

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