Question

Hitunglah berat masing-masing unsur magnesium,belerang dan oksigen dalam 30 gram magnesium sulfat,

Answer 1

Magnesium Sulfat (MgSO4)
Ar Mg = 24,31
Ar S = 32,06
Ar O = 4 X 16 = 64
Mr MgSO4 = 24,31 + 32,06 + 64 = 120,37

Massa Mg = (30 X 1 x 24,31)/120,37 = 6,06 gram
Massa S = (30 X 1 x 32)/120,37 = 7,98 gram
Massa O = (30 X 4 X 16)/120,37 = 15,96 gram