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19 Cards in this Set
- Front
- Back
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Physical change |
Physical state is altered, but composition is the same. I. E. Mekting, boiling etc |
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Sublimation and deposition |
Solid to gas, gas to solid |
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Physical properties |
Color odor density hardness solubility melting and boiling point |
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Chemical change |
Atoms are rearranged to form new substance Exhibited when substance reacts with another; often observable such as color or energy change |
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Extensive properties |
Property of material that is dependent on how much is being considered. Mass, length, volume |
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Intensive property |
Property of material that does npt depend on how much matter is considered. Density, malleability, color |
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Compounds |
Unique substance made up of 2 or more elements that are chemically combined |
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Density |
Ratio of g/mL for solids and liquids. g/L for gases |
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Homogenous mixture |
Composition of mixture is same throughout |
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Heterogeneous mixture |
Composition is not uniform throughout |
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Mixtures |
Combination of 2 or more substances. Have different chem and phys properties from compounds that make them up |
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Counting sig figs |
Absent decimal: start on right side & cross out all zeros until nonzero is reached Present decimal: start on left & cross out all zeros until nonzero is reached |
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Temp conversion |
C to K- c + 273 K to c- k - 273 C to f- 1.8c + 32 F to c- (f-32)/1.8 |
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Accuracy |
How close measurement is to true value |
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Precision |
How closely individual measurements agree with one another |
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Percent error |
(tru valu-calc valu)/tru valu x 100 |
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How many sig figs? |
Smallest amount of decimals in add/subtraction probs Lowest amount in multiply/division probs |
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Metric conversion staircase |
Kilo-hecto-deka-basic unit-deci-centi-milli |
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Cm^3 to ml |
1 mL=1 cm^3 |
