alleryStart learning →2H2 + O2 -> 2H2O: three molecules become two. Why is mass conserved?
AEach element's atom count stays equal
BThe total volume of matter stays equal
CThe total molecule count stays equal
DEach molecule keeps its original identity
Answer & Solution
Correct answer: A. Each element's atom count stays equal
The equation preserves four hydrogen atoms and two oxygen atoms even though the number of molecules changes.
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