Answer:
3.011×0²³ atoms of Ar
Explanation:
To find no.of atoms of Ar gas in 10.2 L at STP.
At STP 1 mole of a gas occupies 22.4 L and contains 6.022×10²³ atoms/molecules or ions.
At STP
22.4 L contains 1 mole Ar t
10.2 L contains (10.2÷22.4)×1 Ar
[tex]\frac{1}{2}[/tex] mole Ar contains [tex]\frac{1}{2}[/tex]×6.022×10²³
=3.011×0²³ atoms of Ar
