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14 Cards in this Set
- Front
- Back
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What is chemistry?
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The study of the composition and properites of matter
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Matter
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anything that takes up space and has mass
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Mass
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The amount of matter in an object (the amount of "stuff" in a given object-measured on a balance...units is grams
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Volume
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The amount of space occupied by an object
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Volume of liquids
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measured with a graduated cylinder (units is mL)
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Volume of Solids
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regular solids are measured with a ruler (l x W x H) (units are cm3)
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Volume of irregular solids
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measured using the water displacment method (not as flask) (units are mL...also can be dm3 or L)
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Relationship between mL and cm3
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1 mL = 1 cm3 (only true for water)
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Metric System prefixes
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Kilo, Hecto, Deca, Basic Unit (meter [lenght] liters [volume] grams [mass], joules [heat/energy]) Deci, Centi, Milli
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Precision
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the degree of exactness to which a measurement can be reproduced (precision of an instrument limited by smallest divison on scale)
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Accuracy
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describes how well the result agrees with an accpeted value (ex. hitting the center of a target)
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Signigicant Figures
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non-zero digits, final zeros after the decimal place, zeros between 2 other signigicant figures
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Adding/subtracting Significant Figures
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answer should be rounded to correspond to the LEAST number of decimal places in the measurements
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Multiplying/dividing Significant Figures
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the answer should be rounded to the LEAST number of significant figures in the measurements
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