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Corrosion

Metal Q: Reaction in the air: Burns to form metallic oxide. Reaction with water: Reacts with steam to form hydrogen and reaction with dilute hydrochloric acid: hydrogen is formed.


Metal R: Reaction in the air: reacts slowly to form metallic oxide. Reaction with water: Does not react. reaction with dilute hydrochloric acid: Does not react.



Metal S: Reaction in the air: reacts to form metallic oxide. Reaction with water: Does not react. reaction with dilute hydrochloric acid: Hydrogen is formed.



List the metals in order of decreasing reactivity. Give reasons for your choice.

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Answer:

s

Step-by-step explanation:

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