Question

If the mass of an electron is $9\times {10}^{-28}\mathrm{grams}$. Calculate the weight of one mole of electron?

Answer 1

Step: Calculating the weight of one mole of an electron:

• A mole of any substance is defined as a unit or measure containing the same number of atoms or molecules.
• 1 mole of electrons contains = $6.023\times {10}^{23}$ electrons.
• The mass of an electron is given as $=9\times {10}^{-28}\mathrm{grams}$
• Hence we can calculate the weight of 1 mole of electrons, given as;

$$\begin{gathered} 1\mathrm{mole}\mathrm{of}\mathrm{electrons}\mathrm{weight}=9\times {10}^{-28}\times 6.023\times {10}^{23} \\ =54\times {10}^{-5}\mathrm{gm} \end{gathered}$$

Hence, the weight of 1 mole of electrons is calculated to be $54\times {10}^{-5}\mathrm{gm}$.