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A chemical change has occurred when a new substance is formed. Characteristics of this include a color change, precipitate is formed or it bubbles meaning a gas has formed.

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Q: When do you say that a change is chemical?
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A chemical change is a change in what?

it is ge in the substance that you have. say if you have a car and it has rust that is a chemical change


Is forming ozone from oxygen a chemical change?

Putting oxygen in tanks (under pressure) is a physical change, not a chemical change. The chemical nature of the oxygen has not been altered, and it is possible to recover the original substance, thus it is not a chemical change.


Is it true that a physical change and a chemical are exactly alike?

Not true, they are not similar; a chemical change is a change in the molecule, the physical change is not.


Is a egg cooking a chemical change?

I would say yes


Is burning a fire a physical or chemical change?

Burning is a chemical change.


A popsicle melting is physical or chemical change?

Melting is a physical change.


What type of change when a substance changes into a new substance?

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Is broken pieces a sign that a chemical change has occured?

Not really. A broken glass is still glass; no chemical change has occurred. But it is physically different, so it is better to say a physical change happened.


Is Cooking an apple is chemical or physical change?

Well let's see, to my extent of this subject,A Phisical change is when you can change it back and fourth, like water turning into ice.A chemical change would be impossible to reverse. Like Sodium mixing with chlorine to form salt.I can't say I'm 100% on this but because you cannot "uncook' an apple, i would say it's a chemical change.


Is a rotting banana a chemical or physical change?

It's a chemical change


Is peeling an apple a physical or chemical change?

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Is cellular respiration an example of a physical change or an chemical change?

its a chemical change