Advanced Placement (AP), 17.12.2020 22:30 keke6361

Hydrogen peroxide breaks down to form water and oxygen gas. When this reaction occurred, the following observations were made:I. The mass of the solution remains the same. II. Phase changes are observed. III. The color of the solution remains clear. IV. The temperature of the solution increases. Which observation is evidence that a chemical change has occurred?

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Hydrogen peroxide breaks down to form water and oxygen gas. When this reaction occurred, the followi...