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chem303.s1.d07

cava chem 303 1.09 Properties of Substances

QuestionAnswer
A [...] property is a characteristic of a substance that you can see without changing the identity of the substance (by chemically reacting it with something). A physical property is a characteristic of a substance that you can see without changing the identity of the substance (by chemically reacting it with something).
A [...] property is how something chemically reacts with other substances. A chemical property is how something chemically reacts with other substances.
One important physical property is denity (D), the ratio of [...] (m) to volume (V ). One important physical property is density (D), the ratio of mass (m) to volume (V ).
The formula for density is D = [...], where m is measured in grams (g) and V is measured in milliliters (mL) or cubic centimeters (cm^3). The formula for density is D = m/V, where m is measured in grams (g) and V is measured in milliliters (mL) or cubic centimeters (cm3).
The density of water is [...] g/ml The density of water is 1 g/ml
[...] changes do not change the composition of matter. Physical changes do not change the composition of matter.
Chemical properties must be observed by detecting chemical [...]. Chemical properties must be observed by detecting chemical changes (or reactions).
A [...] change is one where a substance changes its identity; becoming one or more different substances. A chemical change is one where a substance changes its identity; becoming one or more different substances.
[...] changes occur when substances interact with each other. Chemical changes occur when substances interact with each other.
Color change is usually a sign of a [...] change (a new substance with a different color has been produced) Color change is usually a sign of a chemical change (a new substance with a different color has been produced)
If gas is given off without boiling, that’s usually a sign of a [...] change. If gas is given off without boiling, that’s usually a sign of a chemical change.
If a substance changes temperature on its own (you didn’t stick it in the microwave or something), that’s usually a sign of a [...] change. If a substance changes temperature on its own (you didn’t stick it in the microwave or something), that’s usually a sign of a chemical change.
If you mix two liquids together and a solid forms and sinks to the bottom, that’s usually a sign of a [...] change. If you mix two liquids together and a solid forms and sinks to the bottom, that’s usually a sign of a chemical change.
Precipitation is when water comes out of the mixture we call the sky. In chemistry, a [...] is likewise, any substance that comes out of a mixture. Precipitation is when water comes out of the mixture we call the sky. In chemistry, a precipitate is likewise, any substance that comes out of a mixture.
A precipitate is usually new substance that has been formed through a [...] change (a new substance that does not dissolve in the liquid). A precipitate is usually new substance that has been formed through a chemical change (a new substance that does not dissolve in the liquid).
Created by: mr.shapard