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:
- 2 grams of potassium (K)
- 5 grams of oxygen (O)
The total mass of the reactants is:
\[ 2 , \text{grams (K)} + 5 , \text{grams (O)} = 7 , \text{grams} \]
Therefore, according to the Law of Conservation of Mass, the mass of potassium oxide (K2O) produced will also be:
\[ 7 , \text{grams} \]
So, the correct response is 7 grams.
1 answer