Calculate the number of molecules and number of atoms present in 11.2 litres of oxygen `(O_(2))` at N.T.P

Answer

`3.01 xx 10^(23)` molecules, `6.02 xx 10^(23)` atoms.

Explanation

22.4 litres of `O_(2)` at N.T.P contain `= 6.022xx10^(23)` molecules
11.2 litres of `O_(2)` at N.T.P contain `= (11.2)/(22.4)xx6.022 xx 10^(23)` molecules
`= 3.01 xx 10^(23)` molecules `= 6.02 xx 10^(23)` atoms.