How many mole of atomic Hydrogen (H) is present in the following? 8.13 x 10^22 molecules hyrdrocholric acid?

Answer 1

6.02 X 10^23 molecules per mole

(8.13 X 10^22)/(6.02 X 10^23) = how many moles you have = .13504

HCl = hydrochloric acid has only one mol of hydrogen per mol of acid. Therefore...(1)(.13504) = .13504 moles of atomic hydrogen.

Good luck!

Answer 2

One molecule of hydrochloric acid HCl contains one atom of hydrogen, so 8.13x10^22 molecules of HCl contain 8.13x10^23 atoms of H, which is:

n = N/Na = 8.13x10^22/6.02x10^23 = 0.135 mol of H atoms approx.

where Na the Avogadro's number, the number of particles in one mole.