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How can you be sure that at least one chemical change has occurred?
Wiki User
∙ 8y ago
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
Wiki User
∙ 8y ago
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What is the only sure way to prove that a chemical reaction has occurred?
Signs of chemical reactions may be: - Gas was formed - Formation of a precipitate and water - Reactants disappeared - products were made - energy is released - properties of reactant and products are different
Is making ice cream from sugar and cream a chemical change or physical change?
It is a physical change. :D
When limestone fizzes when acid is added is physical or chemical change?
chemical change
Is developing film a chemical or physical change?
chemical change :-)
Is drying cloths is chemical change?
It is a Physical Change because i dont know but im sure that is a physical change :P
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 is the only sure way to prove that a chemical reaction has occurred?
Signs of chemical reactions may be: - Gas was formed - Formation of a precipitate and water - Reactants disappeared - products were made - energy is released - properties of reactant and products are different
Is baking a physical or chemical change?
pretty sure its a chemical change.
Can a bicycle frame have a chemical change?
Sure. A steel frame that begins to rust will be undergoing a chemical change.
Is the color change experienced by the statue of liberty a physical or a chemical change?
i m pretty sure a colour change represents a Chemical change
Is making ice cream from sugar and cream a chemical change or physical change?
It is a physical change. :D
When a chicken bone turns rubber like and flexible is it a chemical change or physical change?
I'm not sure. I think it is a chemical change.
When limestone fizzes when acid is added is physical or chemical change?
chemical change
What methods do scientist use to determine if it is a physical or chemical change?
For a chemical change they analyze the new substances to prove there has been a change in the chemical composition. I am not sure about physical though.
Is developing film a chemical or physical change?
chemical change :-)
Is clotting of blood a physical or a chemical change?
I depends what is coagulating -- for blood it is certainly chemical. There may be physical coagulation processes, although I'm not sure.
Is size of an object a physical property a physical change a chemical property or a chemical change?
i am pretty sure it is a physical property! :)
