Question

how can we find absolute mass of hydrogen atom
from avagadro no .? ​

Answer 1

Hydrogen's atomic weight is 1. This means that 1 mol of hydrogen atoms (6,023*10^23 atoms) weighs 1 gram. Dividing the two, 1 hydrogen atom weighs 1.66*10^-24 grams.

Answer 2

$\huge\underline\Red\ { Answer}$

$<font color=purple>$ This means that 1 MOLE of hydrogen atomswill weigh 1.008 grams. That said, to find themass of one ATOM, we need to convert from moles to atoms as follows: 1.008 grams/moleHydrogen * (1 mole/6.022x1023 atoms) = 1.67 x 10-24 grams. 16.00 grams/mole Oxygen * (1 mole/6.022x1023 atoms) = 2.66 x 10-23grams.