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A. Potassium nitrate B. Lead nitrate C. ...

A. Potassium nitrate B. Lead nitrate C. Ammonium nitrate. Choose the chemicals from A, B and C to answer the following questions when they are heated.
(a) The chemical which leaves behind no residue.
(b) The chemical which gives oxygen as the only gas.
(c) The chemical which produces nitrogen dioxide.

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