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m = 1,35 gr
mol = jml partikel / 6,02 x 10²³
= 3 x 10²² / 6,02 x 10²³
= 0,049 = 0,05 mol
mol = m/Ar
Ar = m / mol
= 1,35 / 0,05
= 27
logam tersebut adalah Al (Aluminium)