UPSEE 2018 Solved Paper

Given, mass =1.6g of methane
Therefore, moles of methane =

given mass

molecular mass

=

1.6g

16gmol−1

=0.1mol
1 mole of methane has 6.022×1023 molecules.
∴0.1 mole of methane has
6.022×1023×0.1 molecules
=6.022×1022 molecules
Now, 1 mole of methane has 10 electrons
∴0.1 mole of methane has
=10×6.022×1022 electrons
=6.022×1023 electrons