What does percent composition tell you about a substance? O A. It gives you the molecular formula of the substance.
O B. It gives you the total mass of the substance,
O C. It tells you what the substance is made of,
O D. It tells you how many moles are in the substance,

Percent composition tells you which types of atoms (elements) are present in a molecule and their levels. Percent composition can also tell you about the different elements present in an ionic compound as well.

the answer is d.) potassium

c. electrical charges of ionic bonds.