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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
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∙ 14y ago
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What are 5 key words in a chemical change?
These are: reaction, chemical formula, reactant, product, chemical equation.
What are the characteristics of a chemical reaction with example?
5characteristics of chemical reaction 1, evolution of gas 2,formation of precipitate 3,change in temperature 4,change in colour 5,change in state
Is A marshmallow is toasted over a campfire physical or chemical change?
The answer is physical because in physical they are 5 senses see, hear, touch,smell. The toasted marsh mallow you can taste it, smell it when you are far, touch it when you eat it, you can hear it when it comes out of the oven,and you can see it when it's on your plate.
List four clues that a chemical reaction is occurring?
To tell if a chemical reaction has occurred look for these four things: 1) color change 2) the formation of gas bubbles 3) formation of a precipitate 4) temperature change
Is water freezing to form a ice a chemical change?
No, freezing is not a chemical change. It is a physical one. It (freezing) is reversable, and the substance that is changing state to a solid or from a solid is not undergoing any chemical changes.
What are the 5 indications of a chemical change?
1. releasing of heat 2. change of color 3. bubbling 4. change of smell 5. precipitation
What are three things that are often indications of chemical changes?
Chemical changes can be identified by 1. Color change 2. Fizzing 3. Temperature changes 4. Odor changes 5. Change in the state of matter (solid, liquid, gas)
List 5 pieces of evidence that a chemical change description?
formation of a precipitate formation of a gas color change change in temperature change in odor disappearance of a solid
What 5 clues when considering a physical change?
5 clues of a chemical change
What are 5 key words in a chemical change?
These are: reaction, chemical formula, reactant, product, chemical equation.
What is chemical change give 5 example?
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List 5 forms of energy?
mechanical thermal electromagnetic chemical kinetic
What is the differences between chemical and physical change?
A chemical change involves a change in a substance's chemical properties (characteristics that describe how it interacts with other substances).A physical change involves a change in a substance's physical properties(characteristics that describe certain features one can see with their 5 senses).
What are the characteristics of a chemical reaction with example?
5characteristics of chemical reaction 1, evolution of gas 2,formation of precipitate 3,change in temperature 4,change in colour 5,change in state
What are the 5 characteristics of chemical change?
During a chemical change the structure of molecules (as chemical composition) is changed. 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
Examples chemical change?
1.burning a piece of paper 2.water evaporation 3.milk goes sour 4.match is lit 5.rusting of screws
Is A marshmallow is toasted over a campfire physical or chemical change?
The answer is physical because in physical they are 5 senses see, hear, touch,smell. The toasted marsh mallow you can taste it, smell it when you are far, touch it when you eat it, you can hear it when it comes out of the oven,and you can see it when it's on your plate.
