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13 Cards in this Set
- Front
- Back
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Chemistry |
The science that deals with matter i.e the structure and properties of matter + transformations from one form to the other |
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Matter |
Anything that has mass, and takes/occupies space |
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Transformations of matter |
1. Physical change 2.Chemical change |
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Why do we study chemistry? |
To understand our bodies and diseases-important to know as much as possible of chemicalsin our body(e.g. dopamine, serotonin, etc.).. Advancementin medicine àresult of better understanding of Chemistry, Biology and Physics principles Modernmedicine rely heavily on Chemistry. \Important that future Pharmacists & Doctors have an understanding ofChemistry. |
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How do scientists report numbers? |
Make use of exponential notation (scientific notation) because the chances of error are high due to numbers being too small or too large. |
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moving decimal point |
Right- negative Left- Positive |
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Chemical change |
-More commonly called a chemicalreaction.Substances are used up (disappear) & others are formed to take theirplaces.k##.mpu |
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Physical change |
-Involves a change of physical state, e.g.melting of solids & boiling of liquids. -Physical properties: Density, melting point, physical state (liquid, solid, gas), etc.-Example:H2O (water) may be a liquid,solid (ice) or gas (steam D) |
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mass |
Quantity of matter in an object |
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Weight |
The force a mass experiences under the pull of gravity |
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Differences between mass and weight |
-Mass is Independent of location.-Weight = Force a mass experiences under pull ofgravity
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Density |
Density=Mass per unit volume•Density of a substance is a physicalproperty that is constant, i.e. it always has the same value at a given temp. Density changes only when temp. changes |
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Three phases of matter |
solid liquid gas |
