Question

The atomic mass of copper (Cu) is 63.546 amu, the atomic mass of sulfur (S) is 32.065, and the atomic mass of oxygen (O) is 15.999 amu. Which molar mass is correct for copper sulfate (CuSO4)?(1 point)
Responses

159.607 g/mol
159.607 g/mol

446.440 g/mol
446.440 g/mol

111.610 g/mol
111.610 g/mol

225.802 g/mol

Answer 1

CuSO4 = 1 Cu + 1 S + 4 O

M = 63.546 + 32.065 + 4(15.999) = 63.546 + 32.065 + 63.996 = 159.607 g/mol

So 159.607 g/mol is correct.