Question

what is the molecular weight of Al2(SO4)3?

Answer 1

molecular weight of Al2(SO4)3

molar mass of Al = 26.98 g/mol

molar mass of S = 32 g/mol

molar mass of O = 16 g/mol

here we have

mass of 2 Al = 2 x Al = 2 x 26.98 = 53.96 g/mol

mass of 4 O = 4 x 16 = 64 g/mol

mass of (SO4) = 32 + 64 = 96 g/mol

mass of (SO4)3 = 3 x 96 = 288 g/mol

total molecular weigth of Al2(SO4)3 = 53.96 + 288

                                                          = 342 g/mol

molecular weigth of Al2(SO4)3 = 342 g/mol