0
Signs of chemical reactions may be:
- Gas release
- Formation of a precipitate
- Change of color
- Change of odor
- Change of pH
- Change of aspect
- Change of viscosity
- Change of the temperature
- Visible formation of new compounds
Wiki User
∙ 11y ago
Anonymous
How can you be certain that a chemical change has occurred
Add your answer:
Earn +20 pts
When the chemical composition of rock changes what has occurred?
Chemical change not a physical. A CHEMICAL CHANGE
How you tell if matter has undergone a chemical change or a physical change?
If a chemical change has occurred, the chemical composition has changed and new products will have formed, different from the reactants. If a physical change has occurred, the chemical composition does not change and no new products will have formed.
When a substance changes into a different substance a what change has occurred?
Chemical change.
If the mass of all objects before a chemical change is 200kg what would the mass be after the chemical changed occurred?
There will be a gain in mass.....but you can't predict the new change in mass unless you weigh the products after the chemical change occurred.
When a substance changes into a diffrent substance what change has occurred?
chemical change
What are the corresponding evidences shown that a chemical change occurred?
chemical change occurred when new chemical substance was created
Is substance melts proof that a chemical change has occurred?
no unless there is a chemical change but there isn't. only a physical change has occurred
When the chemical composition of rock changes what has occurred?
Chemical change not a physical. A CHEMICAL CHANGE
Are Fizzing or foaming evidence that a chemical change may have occurred?
yes it s an evidence that a chemical change has been occurred
How you tell if matter has undergone a chemical change or a physical change?
If a chemical change has occurred, the chemical composition has changed and new products will have formed, different from the reactants. If a physical change has occurred, the chemical composition does not change and no new products will have formed.
When a substance change into a different substance a change has occurred?
Chemical Change.
When you mix two substances in a beaker and expect them to undergo a chemical change the temperature of the mixture does not change has a chemical change occurred?
a chemical change occurs
Is sugar being heated to produce steam and a black solid a chemical change?
Yes is it a chemical change as the process is irreversible. Also its properties are being changed and it looks different physically which always means a chemical change has occurred or will occur if certain substances are put together.
When you dye your hair is that physical change or chemical change?
Yes it is a chemical change because color change is an observed change that a chemical change has occurred. So you are very much right. :)
When a substance changes into a different substance a change what has occurred?
Chemical change.
When a substance changes into a different substance a what change has occurred.?
Chemical change.
. When a substance changes into a different substance a change has occurred.?
Chemical Change.
