Question

78 g of potassium (k) react with 71 g of chlorine (cl) to produce potassium chloride. according to the law of conservation of mass, what is the mass of the product (2kcl)? (1 point)

o 2 g

o 149 g

o 156 g

o 4 g

Explanation:

Step1: Recall the Law of Conservation of Mass

The law states that mass is conserved in a chemical reaction. So the mass of products equals the mass of reactants.

Step2: Calculate the total mass of reactants

The mass of potassium is 78 g and the mass of chlorine is 71 g. The total mass of reactants is \(78 + 71=149\) g.

Answer:

149 g