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

2 g
2 g

156 g
156 g

149 g
149 g

4 g

Answer 1

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

In this case, you have:

• 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) formed will also be 149 g.

So, the correct response is 149 g.