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)

Question

Responses

225.802 g/mol
225.802 g/mol

446.440 g/mol
446.440 g/mol

159.607 g/mol
159.607 g/mol

111.610 g/mol
111.610 g/mol

Answer 1

To calculate the molar mass of copper sulfate (CuSO₄), we need to add up the atomic masses of its constituent elements:

• Copper (Cu): 63.546 amu
• Sulfur (S): 32.065 amu
• Oxygen (O): 15.999 amu (and there are four oxygen atoms in copper sulfate)

Now we can calculate the total molar mass:

\[ \text{Molar mass of CuSO}_4 = \text{Cu} + \text{S} + 4 \times \text{O} \] \[ = 63.546 + 32.065 + (4 \times 15.999) \] \[ = 63.546 + 32.065 + 63.996 \] \[ = 63.546 + 32.065 + 63.996 = 159.607 \text{ g/mol} \]

Thus, the correct molar mass for copper sulfate (CuSO₄) is 159.607 g/mol.