Matlee is neither created noe destroyed in a cheriseal reaction. Thus, the mass of the products of a chemical reaction must be equal to the mass of A sample of sodien reacte completely wh 355g of chlorine, forming 565g of sodum chioride. What mass of the staring malenials. Formally, this concept is called the lave of conservafion of mass Express your answer to three significant figures and include the appropriste units. Part B. When carbon is bumed in air, it reacts with oxyen to form carbon donde. When 27.6 ig ol carbon mevo bumed in. the presence of 86.5 g of oxpent, 122g of orygen ramained unreacted. What mass of catbon dovide was