Chemistry, asked by aaronmathew2112, 3 months ago

Please give me 2 reversible but chemical changes.

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Answered by Nancy984

2

Answer:

Some chemical changes can be reversed, but only by other chemical changes. For example, to undo tarnish on copper pennies, you can place them in vinegar. ... This changes the copper oxide back to copper and oxygen, making the pennies reddish brown again

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