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Chemistry
Unit 1 Concept 3 Matter
| Question | Answer |
|---|---|
| Differentiate between a compound and a mixture. | Compounds are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances. |
| Distinguish between properties of matter that are extensive vs. intensive and physical vs. chemical. Include examples. | Extensive properties, such as mass and volume, depend on the amount being measured. Intensive properties, such as density and color, do not depend on the amount. Physical properties can be measured without changing a substance's chemical identity. |
| Explain the difference between a chemical change and a physical change, including which results in a chemical reaction occurring. | A physical change is a change in properties such as texture, shape, or state, while a chemical change represents the formation of a new substance after atoms are rearranged in a chemical reaction. |
| List some signs that may demonstrate that a chemical reaction has occurred. | Change in Color, Formation of a Gas, Formation of a Precipitate, Change in Odor, Change in Temperature, Something is Burning, Light is Being Produced. |
| A piece of plastic with a mass of 15g is placed in a graduated cylinder. The water level rises from 32mL to 52mL when the plastic is added. Find the density of the plastic. | D=.75 |
| Matter | Matter is any substance with mass and takes up space by having volume. |
| Mass | A measure of the amount of matter in a substance or an object. |
| Volume | A measure of the amount of space that matter occupies. |
| Atom | A particle of matter that uniquely defines a chemical element. |
| Element | A substance that can't be broken down by non-nuclear reactions. |
| Compound | A substance made up of two or more different chemical elements combined in a fixed ratio. |
| Substance | a matter which has a specific composition and specific properties. |
| Mixture | a compound made up of two or more chemical components that are not chemically linked. |
| Homogeneous mixture | a gaseous, liquid or solid mixture that has the same proportions of its components throughout a given sample. |
| Solution | a homogeneous type of mixture of two or more substances. |
| Solubility | the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution. |
| Aqueus solution | water that contains one or more dissolved substance. |
| Alloy | a mixture composed of two or more elements, at least one of which is a metal. |
| Heterogeneous mixture | a mixture in which the composition is not uniform throughout the mixture. |
| Law of conservation of matter | in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant. |
Created by:
Kamryn7
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