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 =\({Volume\space of \space a \space gas\space at \space STP \over Molar \space volume \space of \space gas}\) 

Solution :

 number of moles of a gas =\({Volume\space of \space a \space gas\space at \space STP \over Molar \space volume \space of \space gas}\) 

=\(0.448 \over 22.4 \)          ---{ 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