3. a coefficient is a number written in front of a chemical symbol and indicates the number of atoms of that element or number of molecules. e. g=___ 2NaSO4=

Will mark as brainliest ! how many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (ii) nitrate solution react with excess aluminum metal? show all work needed to solve this problem!