## How do I find the mass of potassium in a 50.0 . g mass of potassium sulfate?

Answer:

Divide the mass by the molar mass.

Explanation:

Molecular mass \(\mathrm{K}_{2} \mathrm{SO}_{4}=174.26 \mathrm{~g} \cdot \mathrm{mol}^{-1}\)

You can find this by adding the atomic masses of all the atoms that make up the molecule — you can find these in the periodic table.

You have 50.0 g.

Divide the second value by the first.

Now remember to multiply this answer by \(2,\) because there are two \(K-\) atoms per molecule, so the final answer is \(0.574 \mathrm{~mol}\) of \(K\)