I've been having trouble setting up word problems. Here is one problem I need help with.

Question

How many Bromide ions are in a sample of CaBr2 that has a mass of 10.0g?

Answer 1

how many molecues of CaBr2 is in 10g?

molecules: 10/molmassCaBr2 * avag number

bromide ions, 2x the above number.