Question

The mass of a molecule of hydrogen is 3.332*10^-27 kg. Find the mass of 1 kg mol of hydrogen gas

Answer 1

Mass of the molecule of hydrogen atom is= 3.332×10⁻²⁷ kg

We know that, 1 kg mol of hydrogen gas = 6.02×10²⁶ molecules of hydrogen.

∴ The mass of 1 kg mol of hydrogen gas

=(6.02×10²⁶)×3.332×10⁻²⁷ kg

= 2 kg

[∵1 mol of hydrogen weighs 2 gram.]

Answer 2

Mass of a molecule of Hydrogen = 3.332 * 10^-27 kg

1 kg mol of hydrogen gas will contain 6.02 * 10^26 molecules of Hydrogen.

∴ The mass of hydrogen gas =(6.02 * 10^26) * 3.332 * 10^-27

                                                = 2.0 kg