No. of molecules of $H_{2}$ in 22.4 litre at STP is $n N_{o}$ .
Value of $n$ is :

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Solution

As we know,
one mole of each gas occupies 22.4 litres volume and each gas contains $N_{o}$ molecules so 22.4 litres hydrogen gas will contain $N_{o}$ molecules, where $N_{o}$ is a Avogadro's number.
Value of $n$ is 1.

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No. of molecules of H2 in 22.4 litre at STP is nNo.Value of n is :

As we know,one mole of each gas occupies 22.4 litres volume and each gas contains No molecules so 22.4 litres hydrogen gas will contain No molecules, where No is a Avogadro's number.Value of n is 1.

No. of molecules of $H_{2}$ in 22.4 litre at STP is $n N_{o}$ .
Value of $n$ is :

As we know,
one mole of each gas occupies 22.4 litres volume and each gas contains $N_{o}$ molecules so 22.4 litres hydrogen gas will contain $N_{o}$ molecules, where $N_{o}$ is a Avogadro's number.
Value of $n$ is 1.