Question

Which of the following is Loschmidt number?

• A. $6\times {10}^{23}$
• B. $2.69\times {10}^{19}$
• C. $3\times {10}^{23}$
• D. None of these

Answer 1

The correct option is B $2.69\times {10}^{19}$

The no. of molecules present in $1ml$ of gas at $STP$ is known as Loschmidt number.

$22400mL$ of gas has total no. of molecules = $6.023\times {10}^{23}$

$1ml$ of gas has total no. of molecules = $\frac{6.023\times {10}^{23}}{22400}$ = $2.69\times {10}^{19}$