How many Moles are in 15 liters of Hydrogen Gas?

0.67 mole

Explanation:

From detailed studies of gases, we have discovered that at stp 1 mole of a gas occupies 22.4L.

With the above discovery, it means that 1 mole of hydrogen gas occupy 22.4L.

Therefore, Xmol of Hydrogen gas will occupy 15L i. e

Xmol of Hydrogen gas = 15/22.4 = 0.67 mole.

Therefore, there are 0.67 mole of Hydrogen gas in 15L of the gas