Question

If the volume of $X$ molecules of $H_2$ gas at STP is $5L$. What will be the value of $X$ molecules of $O_2$ gas at STP?

• A. $\frac{5}{80}L$
• B. $\frac{16}{5}L$
• C. $\frac{5}{16}L$
• D. $5L$

Answer 1

The correct option is D $5L$

Given:- Volume of $X$ molecules of $H_2$ gas at STP

is $5L$.

moles of $H_2\left(g\right)=\frac{5}{22\cdot 4}$

molecules, $x=\frac{5}{22.4}\times N_A(N_A=$ Avogadro's number

So, Volume for $X$ molecules of $O_2$ gas.

$\text{moles}=\frac{5}{22\cdot 4}\times \frac{NA}{NA}=\frac{5}{22.4}$

1 mole $=22\cdot 4L$

$5\text{mole}{O}_2\left(g\right)=\frac{5}{22:4}\times 224=5L$

So, correct answer is D) $5L,$ means all gases

at STP Containing same number of molecules have

same volume.