Aweighed sample of iron (fe) is added to liquid bromine (br2) and reacts completely. the reaction produces a single product, which can be isolated and weighed. the experiment is repeated a number of times with different masses of iron but with the same mass of bromine. (see graph above.) assuming there was an excessive amount of bromine, use mathematical reasoning, the law of conservation of mass and the graph above to determine the mass of bromine would be consumed if 10.0 g of fe are completely used.