Chemistry - =, > 5 increase the final digit by...

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Goals Understanding the basic principles of composition and classification of matter Conceptual understanding of measurement: Significant figures Units Unit conversions
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What is matter made of ? Smallest entity of matter is ATOM. Atoms are building blocks of ELEMENTS. Molecule: Chemical combination of two or more atoms . Compound: Chemical combination of two or more elements . Note: All compounds exist as molecules.
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Classification of matter based on composition
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States of matter
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Significant Figures and Rounding off results Exact numbers Measurements and uncertainty Exponential notation Rules: Result of multiplication or division should consist of same number of significant figures as the least precisely known number. Result of addition or subtraction should have same number of digits after the decimal point as the number that has the least number of such digits.
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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 non-zero numbers are significant. 2. A zero is significant when it is between non-zero digits and at the end of a number that includes decimal points. 3. A zero is not significant when it is before the first non-zero 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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Chemistry - =, > 5 increase the final digit by...

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