Question

when methane is completely combusted in oxygen forming carbon dioxide and water, how does the mass of the reactant gases compare to the products? answer: a the reactants have greater mass. b the products have greater mass. c the masses of the reactants and products are equal. d the mass of the reactants cannot be determined. e depending on reaction conditions, the total reaction mass could increase or decrease.

Explanation:

According to the law of conservation of mass, in a chemical reaction, the total mass of reactants equals the total mass of products. Methane combustion is a chemical reaction, so the mass of reactant gases (methane and oxygen) is equal to the mass of products (carbon - dioxide and water).

Answer:

C. The masses of the reactants and products are equal.