What is the empirical formula of a compound that contains two moles of calcium, two moles of sulfur and eight moles of oxygen?

Question

A. CaS0
B. CaS02
C. CaSO4
D. Ca2S0
i think D

Answer 1

No, D has the 2 mols Ca but only 1 or S and 1 of O. That's not what the problem says.

Answer 2

so would it be B

Answer 3

No, you're guessing. I see 2 mols S in the problem but not in the answer. C'mon. Write it down. It says the empirical formula is 2Ca, 2S and 8O. Write it down.
Ca2S2O8. Doesn't that look like a multiple of one of the answers. Remember EMPIRICAL formula means SIMPLEST so.........