Question

calculate number of atoms in 2.7 gram of Al

Answer 1

Hello! Let me try to answer this :)

-) n = m/Ar = 2.7/27 = 0.1 mol
-) Number of atoms:
= n x L
= 0.1 mol x 6.02 x 10^23
= 6.02 x 10^22 atoms

Note: Ar = atomic mass of Al = 27 g/mol

Hope this will help you! Thanks and please correct if there are any mistakes ^ ^