It seems like you're trying to describe a chemical reaction involving hydrogen (H₂) and possibly the formation of water (H₂O). From your description, it looks like you are referring to the following reaction:
\[ 2 , \text{H}_2 + \text{O}_2 \rightarrow 2 , \text{H}_2\text{O} \]
In this reaction, two molecules of hydrogen gas (H₂) react with one molecule of oxygen gas (O₂) to form two molecules of water (H₂O).
The law of conservation of matter states that in a closed system, matter cannot be created or destroyed; it can only change forms. Therefore, the number of each type of atom on the reactant side (left) must equal the number on the product side (right).
In this case:
- Reactants: 4 H (from 2 H₂) and 2 O (from O₂)
- Products: 4 H (from 2 H₂O) and 2 O (from 2 H₂O)
Both sides balance, confirming that the reaction adheres to the law of conservation of matter.
To answer your question: True. The reaction you described is an example of the law of conservation of matter, as the number of atoms of each element is the same on both sides of the reaction.