Question

Number of Hydrogen atoms in 15 gram of Hydrogen gas (1) 9 X 1024 (2) 6 X 1024 (3) 3 x 1024 (4) 4.5 x 1024​

Answer 1

Answer:

15 GM of hydrogen = 15/2 nu of moles of hydrogen

number of hydrogen atom = 15/2 × 6.023× 10^23

Answer 2

Answer:

ans is option A

Explanation:

15g of H = 15 moles

1 mol = 6.022x10^23 atoms

15 moles = 15x 6.022x10^23

= 9x10^24