1.

How many atoms are present in one cc of helium gas at STP?

Answer»

SOLUTION :At STP, 22400 CC `=6.022 xx 10^(23)` atoms
At STP, ONE cc=?
Number of atoms present in one cc at STP
`=(6.022 xx 10^(23))/(2.24 xx 10^(4))=2.69 xx 10^(19)`


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