Question

Which chemical equation below shows a balanced reaction that follows the law of conservation of matter?(1 point)ResponsesH2 + O2 → H2OH 2 + O 2 → H 2 O2H2 + 2O2 → 2H2O2H 2 + 2O 2 → 2H 2 O2H2 +O2 → 2H2O2H 2 +O 2 → 2H 2 OH2 + O2 → 2H2O 

Answer 1

To determine which equation represents a balanced reaction that follows the law of conservation of matter, we need to ensure that the number of each type of atom is equal on both sides of the equation.

The correct balanced equation for the formation of water is:

**2H2 + O2 → 2H2O**

This equation shows that 2 molecules of hydrogen gas (H2) react with 1 molecule of oxygen gas (O2) to form 2 molecules of water (H2O).

In contrast, the other options either have incorrect stoichiometry or are not balanced. Therefore, the answer is:

**2H2 + O2 → 2H2O**