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lawyer [7]
4 years ago
11

17 Which substance can not be broken down by a chemical change?(1) ammonia (3) propanal

Chemistry
2 answers:
lyudmila [28]4 years ago
6 0
Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules.
Sindrei [870]4 years ago
5 0
(4) Zirconium

Because it cannot be broken down by chemical change neither a chemical property. It is an element. It consists of only one atom.
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