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| the physical material of the universe; anything that has mass and occupies space. |
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| any characteristic that allows us to recognize a particular type of matter and to distinguish it from other types. |
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| the almost infinitesimally small building blocks of matter |
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| two or more atoms are joined together in specific shapes |
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| no fixed volume or shape. conforms to it, and can be compressed |
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| matter that has distinct properties and a composition that does not vary from sample to sample (water and table salt) |
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| substances that cannot be decomposed into simpler substances |
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| substances composed of two or more elements |
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| combinations of two or more substances in which each substance retains its chemical identity |
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| law of constant composition |
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| the elemental composition of a compound is always the same |
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| vary in texture and appearance. |
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| can be ovserved without changing the identity |
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| descrive the way a substance may change, or react, to form other substances. |
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| do not depend on the amount of sample being examined and are particularly useful in chemistry; used to identify substances |
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| depend on the amount (mass and volume) |
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| changes its phsycial appearance but not composition; changes state |
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| i.e. liquid to solid. liquid to gas, solid to liquid.... |
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| chemical change or reaction |
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| transformed into a chemically different substance |
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| measure of the hotness or coldness of an object;physical property; determines the direction of heat flow |
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| Kelvin to Celsius conversion |
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| those whose values are known exactly |
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| those whose balues have some uncertainty |
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| measure of how closely individual measurements agree with one another |
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| how closely individual measurements agree with the correct, or "true" value. |
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| reflects how much the indiviual measurements differ from the average |
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| all digits of a measured quantity, including the uncertain one. |
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| units are multipllied together, divided into eachother, or "canceled" to ensure that sollutions yield proper units |
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| fraction whose numerator and denominator are the same quantity expressed in different units. |
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