$\overline{)\mathbf{mass}\mathbf{}\mathbf{percent}\mathbf{=}\frac{\mathbf{mass}\mathbf{}\mathbf{element}}{\mathbf{total}\mathbf{}\mathbf{mass}\mathbf{}\mathbf{of}\mathbf{}\mathbf{compound}}\mathbf{\times}\mathbf{100}}$

potassium chromate: **K _{2}CrO**

molar mass K = 39.1 g/mol

molar mass Cr = 52.0 g/mol

molar mass O = 16.00 g/mol

molar mass K_{2}CrO_{4} = (39.1 g/mol x 2) + 52.0 g/mol + (16.00 g/mol x 4)

**molar mass K _{2}CrO_{4} = 194.2 g/mol**

**Mass percent of K:**

total mass K = 39.1 g/mol x 2

**total mass K = 78.2 g/mol**

Calculate the mass percent composition of each constituent element of potassium chromate.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent Formula concept. You can view video lessons to learn Mass Percent Formula. Or if you need more Mass Percent Formula practice, you can also practice Mass Percent Formula practice problems.