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Chemistry
Chapter 2 vocab
Question | Answer |
---|---|
Mass | the amount of matter that an object contains |
Volume | an measure of the space occupied by an object |
Extensive property | depends on the amount of matter in a sample |
Intensive property | depends on the type of matter in a sample |
Substance | matter that has a uniform and definite composition |
Physical property | a quality of a substance that can be observed without changing the substance's composition |
Solid | matter that has a definite shape and volume |
Liquid | matter that has a definite volume and takes the shape of its container |
Gas | matter that takes both shape and volume of its container |
Vapor | gaseous state of a substance that generally exists as a liquid or solid at room temperature |
Physical change | a change to a material that does not change its composition |
Mixture | a physical blend of two or more components |
Heterogeneous mixture | a mixture that is not uniform in composition |
Homogeneous mixture | a mixture that has a uniform composition throughout |
Solution | another name for homogeneous mixture |
Phase | alters a substance without changing its composition |
Filtration | a method for separating a solid from a liquid in a heterogeneous mixture |
Distillation | separation of a liquid by boiling followed by condensation |
Element | the simplest form of matter with a unique set of properties |
Compound | contains two or more elements chemically combined in a fixed proportion |
Chemical change | a change that produces matter with a different composition than the original matter |
Chemical symbol | one or two letters that represent an element |
Chemical property | ability of a substance to undergo a specific chemical change |
Chemical reaction | process in which one or more substances change into one or more new substances |
Reactant | a part of a sample with uniform composition and properties |
Product | substance formed in a chemical reaction |
Precipitate | solid that forms and settles out of a liquid mixture |
Law of conservation mass | in any physical change or chemical reaction, mass can be neither created nor destroyed |