Question

Calculate the total number of electrons present in 1.6 g of methane.

• A. $6.02\times {10}^{22}$ electrons
• B. $6.02\times {10}^{32}$ electrons
• C. $6.02\times {10}^{23}$ electrons
• D. $6.02\times {10}^{20}$ electrons

Answer 1

The correct option is C $6.02\times {10}^{23}$ electrons

$16g$ of Methane has $1mol$ of $C{H}_4$.

$1C{H}_4$ molecule has $10$ electrons.

Thus, $1.6g$ has $0.1mol$ of $C{H}_4$ i.e., $(10\times 0.1)mol$ electrons$=1mol$ electrons $=6.02\times {10}^{23}$ electrons.