Question

How many number of hydrogen atoms are in 1 gram H₂?
(A) 6.022 × 10²³
(B) 3.011 × 10²³
(C) 6.022 × 10⁻²³
(D) 6.022 × 10²⁴

Answer 1

this is your answer.

Answer 2

The molar mass of the hydrogen atom = 1g/mol-1 as per the periodic table

1g of the sample contains 1 mol of hydrogen atoms

Then, 1 mol = 6.022 * 10^23

Hence, there are total of 6.022 * 10^23 hydrogen atoms in the 1 gram of hydrogen atom.

If the molar mass is 2 g.mol-1 then the same will have 0.5 mol of hydrogen molecules

0.5 mol = 3.01 * 10^23

Since there are  2 grams, hence, 2 * 2.01 * 10^23 = 6.02 * 10^23 atoms.