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)

Question

Responses

149 g
149 g

2 g
2 g

4 g
4 g

156 g

Answer 1

According to the Law of Conservation of Mass, the mass of the products must equal the mass of the reactants.

In this case:

• Mass of potassium (K) = 78 g
• Mass of chlorine (Cl) = 71 g

Total mass of reactants = 78 g + 71 g = 149 g

Therefore, the mass of the product (potassium chloride, KCl) produced will also be 149 g.

So the correct response is 149 g.