gen chem

[Lou1024]

Hey everyone,
Im pretty terrible in Chemistry, and Im stuck on something thats probably easy and obvious:
Determine the ratio of cations to anions for the following ionic compounds.
a. Potassium chloride.
b. Calcium Fluoride.
c. Aluminum oxide
d. calcium oxide.
e. Strontium chloride.

If somone could provide me with some information on how I can come about the answers, It would be greatly appreciated.

Thanks,
Lou