A chemist is attempting to identify an unknown compound by determining the mass percent of calcium in an unknown sample. Using a 40.0 g sample of the unknown compound, the chemist obtains 8.02 g of calcium. Which of the following compounds is the unknown calcium compound?
I already know the answer (CaBr^2) Calcium Bromide, but I was wondering what are the steps that need to be taken to come to that answer.
