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

149 g
149 g

156 g
156 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

To find the total mass of the reactants:

\[ \text{Total mass of reactants} = \text{Mass of K} + \text{Mass of Cl} = 78 , \text{g} + 71 , \text{g} = 149 , \text{g} \]

This means that the mass of the product, potassium chloride (KCl), will also be 149 g according to the Law of Conservation of Mass.

So, the answer is:

149 g