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Doctors Medicines MCQs Q&A

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The chemical formula for hydrogen peroxide is H2O2. As it decomposes, or breaks down, the two molecules of H202 separate into two liquid H2O (water) molecules and a single oxygen molecule. These spare oxygen molecules then bond, forming O2 (gas) molecules, the rapidly forming bubbles of oxygen that rise to the surface of the solution. Without the hydrogen peroxide there would be no bubbles and no foam.

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