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it is a completely new object.
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∙ 11y ago
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How can you tell there is a chemical reaction when iron rusts?
Because it is not a physical change it is a chemical change.
When a kettle is boiled you can tell it is NOT chemical change because?
the change is easily reversed so it is a physical change not a chemical change
When ice melts why can you tell there is not a chemical change?
Melting is not a chemical change because the chemical formula of water remain unchanged.
How can you tell at baking a cake produces a physical change?
Baking is a chemical change because involve chemical reactions.
How is letting a copper kettle tarnish a chemical change?
It is a chemical change because when copper tarnishes, it combines with oxygen to become a new substance. You can also tell because of the change of color, a sign of chemical change.
What chemical is made when hydrogen burns?
i dont know? why do you tell me :)
How can you tell if a change in matter is a physical change?
Any change in matter that is does not require the identity of the matter to change is physical. Things like sizzling, popping, effervescence, etc. are physical change. Something to keep in mind though: Anything that burns is undergoing chemical change, no matter what. Any combustion is chemical.
Is making a cake a physical or chemical change?
Baking a cake is a chemical change because the baking powder or soda (whichever one) undergoes a chemical reaction. you can tell because of the bumps or air bubbles. Not only that, but the chemical change is irreversible, you put the ingredients that make up the cake together and you can't change them back. The ingredients don't go back to their original form. You can tell it's a chemical change becaue of the heat, rising, and odor.
Is scrambling an egg a physical or chemical change?
Scrambling an egg is a chemical change. You can tell because chemical changes are irreversible, you cannot change the cooked egg back to a raw egg.
When ice melts you can tell it is a chemical change because?
The melting of ice is a physical not, not a chemical change. You can tell this because the chemical composition of ice and water are exactly the same, i.e. they are both H2O. Only the physical property has changed since one is a solid and one is a liquid.
When gas burns you can tell it is a chemical reaction because?
you saw a reaction you smelt something you heard something and you cant get that gas back to its original form
How can you tell chemical change?
The consequence of a chemical change is the modification of the molecular nature.
