Chapter 1Chemistry: The Study of MatterA. DefinitionsB. Classification of MatterC. Significant FiguresD. Dimensional AnalysisHW #P1P1 will be covered on Q1 and T1Chapter 1Matter and MeasurementChemistry is the study of matter.A. Definitions and History1. Why study Chemistrya) Improvement of Health Careb) Environmentc) Energyd) New MaterialsB. Classification of Matter, Fig 11.1, Fig 1.91. Gas, Liquid, Solid2. Pure Substances3. Mixtures (Figure 1.9)C. Significant Figures  Uncertainty in Measurement1. Rules for Numbersa) All nonzero digits are significant4570.25b) Zeros between nonzero digits are significant10051.03c) Zeros to left of 1st nonzero digit are not significant0.020.0026d) Zeros at the end of a number to the right of a decimal are significant0.020003.0e) Zeros at the end of a number without a decimal  ?11,600 could have 3, 4 or 5better represented with exponential notation (Appendix A1 in text)1.16 × 1041.160 × 1041.1600 × 104Precise Numbers5 Fingers = 1 hand5.000 Fingers = 1.000 hand1 kg = 1000 g1.000 kg = 1000. g2. Rules for Calculationsa) In addition or subtraction one reports the result to the same number of decimal places as the term with the fewest decimal places.b) In multiplication and division one reports the result with no more significant figures than the measurement with the fewest significant figures.Example: Problem 1.50 C(0.0045 × 20,000.0) + (2813 × 12)D. Dimensional Analysis  Unit Conversionnumber × 1 = number6 × 1 = 6Examples:1. I weigh 180. lb, how many kilograms?2. A sign says 40. km/h, how many