here's a question from my recent chem exam that i don't know how to approach: a sample of 0.600 mol of a metal M reacts completely with excess fluorine to form 46.8 g MF2 a) how many moles of F are in the sample of the compound that forms? b) how many grams of M are in this sample of MF2? c) what element is represented by the symbol M? i started to try to write a balanced equation for this but i'm not sure if the coeffecients would be right... any help? thanks!