Question

Compute gram molecular weight of H2 gas if 4 g of H2 gas contains 24.09 × 10 23 atoms : (A) 4 g (B) 3 g (C) 2 g (D) 1 g explain in detail take brainest warna report

Answer 1

Answer:

Option C

Explanation:

1 mol = 6.02 x 10^23 molecules = 2 x 6.02 x 10^23 atoms [as the atomicity is two in H2]

given moles = 4/2 = 2 moles

therefore, 2 moles have 2 x 2 x 6.02 x 10^23 atoms which is equal to 24.09 x 10^23 atoms

So molecular weight is 24.09 x 10^23/ 2 x 6.02 x 10^23 = 2g

Or much more simpler:-

Atomic mass of hydrogen:- 1g

Atomicity of H2 is 2

Molecular mass = 1 x 2 = 2g

Answer 2

Answer:

Explanation:

Option C

1 mol = 6.02 x 10^23 molecules = 2 x 6.02 x 10^23 atoms [as the atomicity is two in H2]

given moles = 4/2 = 2 moles

therefore, 2 moles have 2 x 2 x 6.02 x 10^23 atoms which is equal to 24.09 x 10^23 atoms

So molecular weight is 24.09 x 10^23/ 2 x 6.02 x 10^23 = 2g

Or much more simpler:-

Atomic mass of hydrogen:- 1g

Atomicity of H2 is 2

Molecular mass = 1 x 2 = 2g