posted by Nescha .
I've been having trouble setting up word problems. Here is one problem I need help with.
How many Bromide ions are in a sample of CaBr2 that has a mass of 10.0g?
how many molecues of CaBr2 is in 10g?
molecules: 10/molmassCaBr2 * avag number
bromide ions, 2x the above number.