Molar Mass of Al = 27
Molar Mass of S = 32
Molar Mass of O = 16
Putting the molar mass value in Al2 (SO4) 3
27 x 2 + 3 ( 32 + 16 x 4)
54 + 3 ( 32+ 64)
54 + 3 x 96
54 + 288
342
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