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Signs of chemical change are when a substance changes into a new substance. Like Paper being burned turns into gray powder. That is a chemical change.
the mass of the property does not change
It does but it is Not a chemical change its physical change...
Chemical
Oxidation.
chemical
Mold
its a chemical change
chemical change
it is a chemical change
It's a Chemical change.
It is a chemical change - oxidisation.
Chemical Change
chemical
Chemical change
Yes.
I'm not sure. I think it is a chemical change.