Question

question 7: an equation for a chemical reaction is shown. naoh + hcl → nacl + h₂o which statement provides evidence that mass is conserved in the reaction? a two new substances are formed in the products. b water is on of the products, but not one of the reactants. c two hydrogen atoms are in the reactants, and two hydrogen atoms are in the products. d one chlorine atom pairs with one sodium atom in the products, and one chlorine atom pairs with one hydrogen atom in the reactants.

Explanation:

The law of conservation of mass states that in a chemical reaction, the total mass of the reactants equals the total mass of the products. This is evidenced by the number of each type of atom being the same on both sides of the chemical equation. In option C, it shows that the number of hydrogen atoms is conserved (2 hydrogen atoms in reactants and 2 in products), which is an indication of mass conservation.

Answer:

C. Two hydrogen atoms are in the reactants, and two hydrogen atoms are in the products.