Grade 12th passPhysical Chemistry
Mixture of ch4 and so2 is 2 litre give no. Of atoms of mixture
1 Answer
varun
HELLO PIYUSH SHARMA
Molecular weight of the gas = 2 x vapour density
= 26 x 2
= 52 g
and you know that,
PV = nRT
At STP, T= 273K
P = 1atm
and V = 2L
R = 0.0821 L atm/K.
therefore,
n = PV/RT
= 1 X 2
-----------------------------------------------------
0.0821 X 273
=> 0.089 mol
and also,
Mass of the mixture = Number of moles X molecular weight
= 52 X 0.089
= 4.64gm
and gram atomic weight of the mixture = Molecular mass of CH4 + Molecular mass of SO2
= 16 + 64
= 80gm
Therefore,total number of atoms = 4.64 X 6.023 X 10^23
-----------
80
= 3.49 X 10^22 no of atoms
THANK YOU
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