Question

B. Calculate number of moles of hydrogen
in 0.448 litre of hydrogen gas at STP
(Ans. : 0.02 mol)​

Answer 1

Answer:

The number of moles of hydrogen is 0.02 moles

Explanation:

At Standard temperature and pressure (STP), gases have a volume of 22.4 L per mole.

Therefore 22.4 liters of hydrogen gas   →  1 mole of hydrogen

1 liter of hydrogen gas  →  $\frac{1}{22.4}$  moles of hydrogen

∴ 0.448 liter of hydrogen gas contains $\frac{1}{22.4}$  ×  $0.448$ moles of hydrogen

That is equal to 0.02 moles.

The number of moles of hydrogen  in 0.448 liters of hydrogen gas at STP is 0.02 moles.