B. Calculate number of moles of hydrogen in 0.448 litre of hydrogen gas at STP

Question

4) solve problems

B. Calculate number of moles of hydrogen in 0.448 litre of hydrogen gas at STP

Answer 1

Given : volume of hydrogen at STP =0.448 L

To find : number of moles of hydrogen

Formula : number of moles of a gas =$\frac{VolumeofagasatSTP}{Molarvolumeofgas}$ 

Solution :

 number of moles of a gas =$\frac{VolumeofagasatSTP}{Molarvolumeofgas}$ 

=$\frac{0.448}{22.4}$          ---{ volume of gas at stp = 22.4 dm³ mol^-1} 

=0.02 mol 

$\therefore$ number of moles of hydrogen in  0.448 L at STP is = 0.02 mol