Question

The total number of molecules contained in $22.4$ litres of hydrogen at STP is :

• A. $12.04\times {10}^{23}$
• B. $3.01\times {10}^{23}$
• C. $6.02\times {10}^{23}$
• D. none of the above

Answer 1

Answer: (C)

$6.02\times {10}^{23}$

The total number of molecules contained in $22.4$ litres of any gas at NTP is equal to Avogadro's number which is equal to $6.02\times {10}^{23}$. This corresponds to 1 mole of a gas.