Chemistry chapter 3 test
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15 terms
Terms | Definitions |
|---|---|
 a quantity that has both a number and a unit | measurement |
| a measure of how close a measurement comes to the actual value of whatever was measured | accuracy |
| the correct value based on reliable references | accepted value |
| the value measured in the lab | experimental value |
| experimental value minus the accepted value | how do you find error |
| absolute value of error divided by the accepted value multiplied by 100 percent | how do you find the percent of error |
| all digits that are known plus a last digit that is estimated | significant figures |
| International System of Unites | SI |
| meter, kilogram, kelvin, the second, the mole | what are the five units commonly used by chemists |
| meter | what measures length |
| liter | what measures volume |
| kilogram | what measures mass |
| a force that measures the pull of a given mass by gravity | weight |
| kelvin and celsius | what measures temperature |
| calorie | what is energy measured by |
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