Pls explain your answer nicely!

I'm no Chemist, but will give it a go!.

1 molecule of methane is: CH4. This means that 1 molecule of methane consists of 1 atom of Carbon 6 and 4 atoms of Hydogen 1. Since 1 atom of Carbon 6 has 6 protons and, therefore, 6 electrons. And since 1 atom of Hydrogen 1 has 1 proton and 1 electron, therefore 4 Hydrogen atoms have 4 electrons.

So, 6 electrons from the Carbon atom + 4 electrons from 4 Hydrogen atoms = 10 electrons in 1 molecule of methane, CH4.

Since 1 mole of methane has =6.023 x 10^23 molecules, therefore 1 mole of methane has:

10 x [6.023 x 10^23] =6.023 x 10^24 electrons.

why have you taken 6.023 instead of 6.022 ? 

There is at least one online dictionary that mistakenly gives 6.023 instead of 6.022 Rosala, so it's possible Guest#1 came across this.  However, the important thing here is the process by which he/she obtained the answer - I'm sure you can easily modify the result using 6.022 yourself if necessary!

actually , the surprising this is that in the worksheet i received from school, 6.023 is given as answer so i was just wondering why that value was used, but thanks for the help,