Classical Laws of Chemical Combination

The law of conservation of mass states that in any chemical reaction, mass is neither gained nor lost. That means that the total mass of the reactants is equal to the total mass of the products. [Pg.34]

EXAMPLE I Calculate the mass of the product of reaction of 6.54g of zinc with 3.21 g of sulfur. [Pg.34]

Solution The compound produced has a mass equal to the total mass of the reactants [Pg.34]

The law of conservation of mass is important especially for reactants or products that are hard to weigh. Also, this law can he used to solve for the masses of reactants as well as those of products, just as the algebraic equation x = a + b can be solved for x if a and b are given as well as it can be solved for i if a and x are given. [Pg.34]

EXAMPLE2 Calculate the mass of the oxygen that reacts with 1.24g of methane (natural gas) to form 3.41 g of carbon dioxide and 2.79g of water. (The mass of each product was also determined using the law of conservation of mass. See Supplementary Problem 2.) [Pg.34]

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