Question

calculate the number of eletron in 11.2 litre of SO2 gas at STP

Answer 1

Any gas with one mole at STP occupies 22.4l

So,22.4 litre of SO₂ has 1 mole

11.2 l has 11.2/22.4 = 1/2 moles

No. of molecules of SO₂ = 6.022  * 10²³/2

=3.011 * 10 ²³ molecules

One molecule of SO₂ has 3 atoms

So, 3.011 * 10 ²³ molecules has = 3.011 * 10 ²³ * 3

                                               = 9.033 * 10²³ atoms