Question

2 grams of potassium (K) reacts with 5 grams of Oxygen (O). According to the Law of Conservation of Mass, how many grams of potassium oxide (K2O) will be produced? (1 point)
Responses

7 grams
7 grams

5 grams
5 grams

10 grams
10 grams

2 grams

Answer 1

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

In this case:

- Mass of potassium (K) = 2 grams
- Mass of oxygen (O) = 5 grams

Total mass of reactants = 2 grams + 5 grams = 7 grams

Therefore, the mass of potassium oxide (K2O) produced will be 7 grams.

So the correct answer is **7 grams**.