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A process in which a liquid is boiled to produce a vapor that is condensed again into a liquid
In the chemical reaction in which sucrose is heated ans decomposes to form carbon dioxide and water, which of the following is a reactant?
What must occur for a change to be a chemical reaction?
There must be a change in chemical properties
Which of the following are considered physical properties of a substance?
Color and odor, malleability and hardness, melting and boiling points
A substance that forms a vapor is generally in what physical state at room temperature
liquid or solid
A substance that can be separated into two or more substances only by a chemical change is a
What is one difference between a mixture and a compound
A compound can only be separated into its components by chemical means
What distinguishes a substance from a mixture?
Mixtures can be separated physically, while compounds cannot.
All of the following are physical properties of a substance in the liquid state except
What must be done to be certain that a chemical change has taken place
Check the composition of the sample before and after the change
When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place
a chemical change
Which of the following does not indicate that a chemical change may have taken place?
Which of the following is a chemical property of water at 4 degreesC
Its ability to decompose into hydrogen and oxygen
Which of the following is true for all chemical reactions
The total mass of the reactants equals the toal mass of the products
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