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Unformatted text preview: Practice: Solve to the correct number of significant figures. 7.3041 x 0.62 = 9.054 x 1.33 = 12.0 / 4.6743 = Addition and Subtraction: the number of places after the decimal point in the answer will be the same as the measurement with the fewest places after the decimal point. ***Looking at digits after the decimal place…not significant figures! Practice: Solve to the correct number of significant figures. 0.507 + 150.0 = 16.9036 – 8.31 = 121.0 + 0.00008 = Conclusions: Density measures how much “stuff” is in a given amount of space Use the formula D = m/v The density of a sample can change as the conditions change Significant figures are important in calculations o Multiplication and division rule… o Addition and subtraction rule…...
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This note was uploaded on 01/01/2012 for the course CHEM 101 taught by Professor Donahue during the Spring '11 term at Long Island U..
 Spring '11
 DONAHUE
 Chemistry

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