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You know a chemical change happened if: -A change in color -Formation of a precipate (a solid) -Formation of a gas
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List 5 indications of a chemical change?
If an object has changed its chemical composition it has been through a chemical change. If you can't reverse what has been done in any way (things like burning, mixing, rusting) it's a chemical change
List 3 chemical properties?
Three chemical properties are reactivity, flammability, and oxidation state.
Which of these is a chemical change copper melting or water freezing or iron rusting or gas condensing?
The only example of a chemical change in the list is iron rusting. The other three are all examples of physical changes.
Is peeling an apple a physical or chemical change?
it is a chemical change
When a substance undergoes a phase change what occurs a particle change a chemical change a new substance is formed a physical change?
When a substance changes phase, this is a physical changerather than a chemical change. When water freezes to become ice, or when ice melts to become water, its all physical.
Four clues to a chemical reaction?
list four possible clues to a chemical change
Is Buring wood a physical or chemical change?
Burning wood is a chemical change because it involves a chemical reaction between the wood and oxygen, resulting in the formation of new substances like carbon dioxide and water vapor.
List 5 indications of a chemical change?
If an object has changed its chemical composition it has been through a chemical change. If you can't reverse what has been done in any way (things like burning, mixing, rusting) it's a chemical change
What makes up a chemical change?
The chemical change is made by these following:- 1. Temperature 2. pressure 3. Nature of chemical
List some signs or clues that show that a change you are observing is a chemical change.?
flammability density smoke burned
Why is it diffifult to make a list of simple rules that will let you classify a chemical and phyiscal change?
It is not that difficult if you know the difference between a chemical and physical change. A physical change is reversible and a chemical change is not. In a physical change a new substance is not formed. The breaking of glass is not reversible and is physical.
Write 3 differences between chemical and physical change?
Okay now here goes in a physical change no chemical reaction takes place. in chemical change chemical reactions take place. A physical change is reversible but a chemical change is not.In a physical change no new substance is formed(A+B=B) in a chemical change new substances are formed(A+B=C)
List 3 chemical properties?
Three chemical properties are reactivity, flammability, and oxidation state.
List the physical and chemical changes that occur when gasoline enters an automobile engine and burns?
it is a chemical change because it causing the fuel to burn
What makes up a chemical?
The chemical change is made by these following:- 1. Temperature 2. pressure 3. Nature of chemical
Is burning a fire a physical or chemical change?
Burning is a chemical change.
What is the chemical change for cerium?
The cation of cerium is Ce(3+).
