What is the molar mass of al2(so4)3? 150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol

1) we find  out the atomic mass of these elements (Al, S, O)

Atomic mass (Al)=27 amu
Atomic mass (S)=32 amu
Atomic mass (O)=16 amu

2)Now, we calculate the molar mass of Al₂(SO₄)₃
molar mass=2(27)+3[32+4(16)]=54+3(32+64)=54+3(96)=54+288=342 g/mol.

342.17 g/mol.