Question

What is the mass of 1 mole of $\mathrm{H}$?

Answer 1

Calculating the mass of 1 mole of hydrogen(H):

Step 1: Analyzing the given data

Number of moles of H = 1 mol.

Molecular weight of H $=1{\mathrm{gmol}}^{-1}$.

Step 2: Calculating the mass of 1 mole of hydrogen

Formula for calculating the number of moles

$$\begin{gathered} \mathrm{n}=\frac{\mathrm{m}}{\mathrm{M}} \\ \mathrm{where},\mathrm{n}=\mathrm{number}\mathrm{of}\mathrm{moles} \\ \mathrm{m}=\mathrm{given}\mathrm{mass} \\ \mathrm{M}=\mathrm{molecular}\mathrm{mass} \end{gathered}$$

Put the value

$$\begin{gathered} 1\mathrm{mol}=\frac{\mathrm{m}}{1\mathrm{g}{\mathrm{mol}}^{-1}} \\ \mathrm{m}=1\mathrm{mol}\times 1\mathrm{g}{\mathrm{mol}}^{-1} \\ \mathrm{m}=1\mathrm{g} \end{gathered}$$

Hence, the mass of 1 mole of $\mathrm{H}$ is 1g.