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What kind of physical evidence might be observed what would indicate that chemical reaction occurred?
Wiki User
∙ 9y ago
Some indicators of a chemical reaction are:
- change of color
- change of odor
- release of a gas
- change of the temperature
- change of the viscosity
- formation of a precipitate
- change of general appearance
- possible explosion
- possible chemiluminescence -formation of new compounds
Wiki User
∙ 9y ago
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Are Fizzing or foaming evidence that a chemical change may have occurred?
yes it s an evidence that a chemical change has been occurred
What would not be evidence that a chemical reaction has occurred in a container?
a perfectly claen container
On what percentage of the Moon's have eruptions been observed?
About 50% of the moons in our solar system have eruptions. Only about 2% to 5% are actually observed, but there is sufficient evidence that others have occurred.
Why does a change in body temperature indicate that a chemical reaction may have occurred?
Because a disease involve frequently chemical reactions in the organism.
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. :)
Are Fizzing or foaming evidence that a chemical change may have occurred?
yes it s an evidence that a chemical change has been occurred
What symbols indicate that a chemical reaction has occurred?
The sign equql + or an arrow to right.
What would not be evidence that a chemical reaction has occurred in a container?
a perfectly claen container
On what percentage of the Moon's have eruptions been observed?
About 50% of the moons in our solar system have eruptions. Only about 2% to 5% are actually observed, but there is sufficient evidence that others have occurred.
Why does a change in body temperature indicate that a chemical reaction may have occurred?
Because a disease involve frequently chemical reactions in the organism.
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. :)
There are several types of evidence that suggests a chemical reaction has occurred What always happens?
A new compound is formed
What is the only sure evidence for a chemical reaction?
The only way to be sure a chemical reaction or change has occurred is to test the composition of a sample before and after a change.
What sensory evidence could be used to argue that a chemical transformation of the substance had occurred?
by a change in smell and appearence of a substance
If you were required whether a particular metal had reacted with a specific reagent what sensory evidence could be used to argue that a chemical transformation of the substance had occurred?
the chemical composition of the element
How can you be sure that at least one chemical change has occurred?
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
Is fizzing a chemical change?
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.
