Which of the following is the correct molar mass of sodium sulfate?
A) 55.06 g/mol
B) 119.1 g/mol
C) 78.05 g/mol
D) 142.0 g/mol
E) 110.0 g/mol

Question

Quizplus · Accepted Answer

Sodium sulfate (Na2SO4) has a molar mass calculated by adding the molar masses of 2 sodium atoms (Na, 22.99 g/mol each), 1 sulfur atom (S, 32.06 g/mol), and 4 oxygen atoms (O, 16.00 g/mol each). The calculation is 2(22.99) + 32.06 + 4(16.00) = 142.04 g/mol, which is approximately 142.0 g/mol.

Which of the Following Is the Correct Molar Mass of Sodium