Question

The GAM of hydrogen is 1 g. How many grams of hydrogen gas contains avogadro number of molecules?

• A. 1 g
• B. 2 g
• C. 3 g
• D. 4 g

Answer 1

The correct option is B

2 g

GAM of H atom is 1 g.

We know that Hydrogen is a diatomic molecule. Each molecule has 2 atoms of H.
Hence, an avogadro number of molecules of $H_2$, which is equivalent to one mole of $H_2$ gas, has 2 moles of H atoms.

Hence, the required answer is the mass of 2 moles of H atoms, which is 2 g.