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Unformatted text preview: =, > 5 increase the final digit by one unit. < 5 leave the final digit unchanged Determining the number of significant figures in a number: 1. All nonzero numbers are significant. 2. A zero is significant when it is between nonzero digits and at the end of a number that includes decimal points. 3. A zero is not significant when it is before the first nonzero digits and at the end of a number with out decimal point. Units: SI System and Metric System SI system Metric system Conversion factors: What are they? Relationships that allow the conversion of one unit into another. Ex: 1 kg = 1000g. Number Unit 1liter = 1000 ml. 1ml = 1 cubic cm. What weighs more, a ton of bricks or a ton of feathers ? density (d) = mass (m) volume (v) Units: Solids g / cc Liquids g / ml Gases g / L...
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 Spring '11
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 Chemistry, Atom

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