Question

find the no.of atoms of the following: 1. 9g ( al),,,,, 2. 0.8g ( iron)

Answer 1

Al has gram atomic mass as 27 = 1 mole atoms(which when divided by 3 gives 9 ) thus 9g Al has 1/3 mole atoms .
||ly calculate for iron with gram atomic mass 52 (which when divided by 65 gives 0.8)
and thus 1/65 mole atoms