Q. 12
The quantity <spa A. mass of the gas
B. kinetic energy of the gas
C. number of moles of the gas
D. number of molecules in the gas.
Answer :
We know that ideal gas equation is
PV=nRT
Where V= volume of gas
R=gas constant
T=temperature
n=number of moles of gas
P=pressure of gas.
Gas constant R=kNA
Where k=Boltzmann constant
NA=Avogadro number
So, we can ideal gas equation as
PV=nkNAT
Now, we know that
n
=number of molecules of gas ……(ii)
Therefore, from equation (i) and (ii)
Number of molecules of gas=
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