Calculate the molar mass, in g/mol, of Al₂(SO₄)₃.

Question

Quizplus · Accepted Answer

To calculate the molar mass of the compound, we need to add up the atomic masses of all its constituent elements. The atomic masses of Al, S, U, and B can be found on the periodic table:

Al: 26.98 g/mol 
S: 32.06 g/mol 
U: 238.03 g/mol 
B: 10.81 g/mol

We see that the compound contains 1 Al, 2 S, 2 U, and 27 B atoms. It also contains 15 oxygen atoms, which can be calculated as follows: 
14 from (SO4)2-, 1 from SO4-

Thus, the total molar mass of the compound can be calculated as: 
(1 * 26.98 g/mol) + (2 * 32.06 g/mol) + (2 * 238.03 g/mol) + (27 * 10.81 g/mol) + (15 * 15.99 g/mol)

= 342.17 g/mol

Therefore, the answer is C.

Calculate the Molar Mass, in G/mol, of Al2(SO4)3

Calculate the Molar Mass, in G/mol, of Al₂(SO₄)₃