Question

What is the total number of electrons present in one mole of ethane?

• A. $6.022 \times 10^{23}$
• B. $10.022 \times 10^{25}$
• C. $108.4 \times 10^{23}$
• D. $1.084 \times 10^{23}$

Answer 1

Answer: (C)

The formula of ethane is $\left( CH _{3}- CH _{3}\right)$,
i.e.It has two carbon atoms and each contain six electrons.
Also, it has six hydrogen atoms, which contain 1 electron.
Thus, total number of electrons $=6+6+6=18$
Therefore, one mole of ethane has
Therefore, one mole of ethane has
$18 \times 6.02 \times 10^{23}=108.36 \times 10^{23}$
i.e. $108.4 \times 10^{23}$ electrons
( $\because 1 mol =6.02 \times 10^{23}$ particles)