> Q. What will be the number of molecules in $1,cm^3$ of a gas at a pressure of 1.38 atm and temperature $27^circ$C ? – LIVE ANSWER TODAY

Q. What will be the number of molecules in $1,cm^3$ of a gas at a pressure of 1.38 atm and temperature $27^circ$C ?

In This post you will get answer of Q.
What will be the number of molecules in $1,cm^3$ of a gas at a pressure of 1.38 atm and temperature $27^circ$C ?

Solution:

$pV=n,RT,Rightarrow,n=frac{pV}{RT}.Here,nR=nN_A,k$where $n,N_A$ is the number of molecules in the sample.$Hence,N=n N_A=frac{pV}{kT} =frac{1.38,times,10^{-5},times10^{-6}}{1.38 times 10^-{23}times,300}=3.3,times 10^9$

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