According to the Law of Conservation of Mass, the total mass of the reactants must equal the total mass of the products.
In this reaction, you have:
- 78 g of potassium (K)
- 71 g of chlorine (Cl)
To find the mass of the products, you simply add the masses of the reactants together:
\[ \text{Mass of products} = \text{Mass of K} + \text{Mass of Cl} \]
\[ \text{Mass of products} = 78 , \text{g} + 71 , \text{g} = 149 , \text{g} \]
Thus, the mass of the product (potassium chloride, KCl) is 149 g.
So the correct answer is 149 g.
1 answer