Question

If atomic mass of carbon atoms is12.0107 u so what is the atomic mass of 1kg graphite
(graphite contain pure carbon)
[Total atomic weight of 1kg graphite]​​

Answer 1

Answer:

First you need to find relative molecular mass. You can calculate it using relative atomic mass of C and O So

MCO2=12+16×2

=44gmol−1

molecular mass of CO2 is 44. Which mean 44 grams of CO2 contain Avogadro’s number of atoms. So,

44gmol−1=6.022×1023mol−1 (Avogadro’s number)

442=6.022×10232

22g=3.011×1023

So 22g of CO2 have 3.011×1023 CO2 molecules.

Since one molecule has one carbon atom it also has 3.011×1023 Carbon atom