1 gram H / 1 atomic mass unit (grams ) What is wrong with the math here ?

[morrobay]

One atomic mass unit = .001660565 x 10^-24 grams
One gram Hydrogen / .001660565 x10^-24 grams = 6.02 x 10 ²⁶ ?

This should be Avogadros number 6.02 x 10²³
what is the mistake here ?

 

[phyzguy]

It appears you're mixing grams and kilograms. 1 AMU = 1.6x10^-24 g = 1.6x10-27 kg.

 

[morrobay]

It appears you're mixing grams and kilograms. 1 AMU = 1.6x10^-24 g = 1.6x10-27 kg.

Thanks , right, I moved the decimal in the wrong direction when converting kg to g
1 amu = 1.66 x 10^-27 kg = 1660 x 10 ^-27 grams
= 1.66 x 10^{-24 grams}