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Ksenya-84 [330]
3 years ago
5

Why is the water cycle called a cycle and not a system?

Chemistry
1 answer:
alexira [117]3 years ago
5 0
It is called a cycle because it is repetitive, therefore making it a cycle (or almost never ending)
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Explain why aluminum does not react with potassium nitrate (KNO3) although it reacts with copper nitrate
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Answer:

Potassium is more reactive than aluminium, so no reaction takes place. But aluminium is more reactive than copper, so it replaces the copper in copper nitrate

<h3>Explanation:</h3>

More reactive metal compound + less reactive metal

-> no reaction

However

Less reactive metal compound + more reactive metal

-> more reactive metal compound + less reactive metal

This is called substitution reaction where the more reactive metal replaces the less reactive metal in the compound.

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