The formula weight of aluminum sulfate al2 so4 3 is

Asked by admin @ 01/12/2021 in Chemistry viewed by 318 People

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

Answered by admin @ 01/12/2021

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.

answer: 342.17 g/mol.

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