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

Question

Chemistry

Seamus Mathis

18 October, 19:21

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

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Nathaniel Knox · Answer 1

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.