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CHM 1110 – General Chemistry I

CHM 1110 – General Chemistry I. Dr. Paul Stein Office: S3305 Lab: S3313A pstein@css.edu Phone - 6065. Office Hours MW: 3:30 – 4:30 TR: 1:00 – 2:00 F: 10:30 – 11:30 Usually available MWF 9:30 – 2:00. student registration info course General Chemistry I - CHM 1110 with LearnSmart

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CHM 1110 – General Chemistry I

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  1. CHM 1110 – General Chemistry I Dr. Paul Stein Office: S3305 Lab: S3313A pstein@css.edu Phone - 6065 Office Hours MW: 3:30 – 4:30 TR: 1:00 – 2:00 F: 10:30 – 11:30 Usually available MWF 9:30 – 2:00

  2. student registration info • course General Chemistry I - CHM 1110 with LearnSmart • instructor • Paul Stein • section - CHM1110-fall2013-8am how to register: It's easy! Go to your section web address and click register now. • section web address : • http://connect.mcgraw-hill.com/class/p_stein_chm1110-fall2013-8am Web addresses cannot contain spaces. Use lowercase letters, numbers or special characters ('-' and '_' ) only. Having trouble registering? Get help here: http://bit.ly/StudentRegistration Learnsmart assignments vs. Connect homework problems 1st assignment – Chapter 1 Learnsmart – due Thursday at 11:59 pm: ~ 15 minutes

  3. Chemistry: The Science of Change 1.1 The Study of Chemistry Chemistry You May Already Know The Scientific Method 1.2 Classification of Matter States of Matter Mixtures 1.3 The Properties of Matter Physical Properties Chemical Properties Extensive and Intensive Properties 1.4 Scientific Measurement SI Base Units Mass Temperature Derived Units: Volume and Density 1.5 Uncertainty in Measurement Significant Figures Calculations with Measured Numbers Accuracy and Precision 1.6 Using Units and Solving Problems Conversion Factors Dimensional Analysis Tracking Units 1

  4. The metric system is part of the International System of Units, or Système International d’Unités(SI). standard unit base unit distance – meter (m) meter (m) mass – kilogram (kg) gram (g) time – second (s) second (s) Volume - m3 liter (L) = dm3 Scientific Notation 109 106 103 10-1 10-2 10-3 10-6 10-9 A nanoparticle has a length of 72 nm, what is it’s length in m? a) 7.2 x 10-6 b) 7.2 x 10-9 c) 7.2 x 10-8 d) 7.2 x 10-10 How many liters are in 1 m3? a) 10 b) 100 c) 1000 d) 0.001

  5. Penny – 2.5% copper plated over zinc Nickel – mixture (alloy) 0f 25% nickel and 75% copper Derived Units: Volume and Density The density of a substance is the ratio of mass to volume. d = density kg/m3 or g/ml (most solids/liquids) m = mass (use g) V = volume (use ml) In units …. ml = g ÷ g/ml or ….. ml = g x ___ml___ g V = ? a) md b) m/d c) d/m d) 1/(md) A penny has a density of 7.19 g/ml and weighs 2.509g. What is it’s volume in ml? (60s) 0.349 ml A nickel weighs 4.951g and occupies 0.553 ml Is it made out of the same substance as the penny? (60s) a) yes b) no

  6. iClicker – example question Prediction question Coke vs. diet coke …. a) sink b) float

  7. Density (mass/volume) (g ml-1) Density of water 4˚C 1.0000 20˚C 0.9982 25 ˚C 0.9970 30 ˚C 0.9957 A 12 oz. can of pop has a volume of 355 ml soda but the total can volume is 371 ml (3 significant figures). Assuming the soda has the density of water and the empty can weighs 14.97g should the can sink or float in water at 20ºC? a) sink b) float Empty can = 14.97g Diet = 368.29 g – 14.97 = 353.32 g can density = 0.995 g ml-1 Regular = 384.00 g – 14.97 = 369.03 g can density = 1.04 g ml-1 354 g at 20ºC demo

  8. Worked Example 1.7 The Food and Drug Administration (FDA) recommends that dietary sodium intake be no more than 2400 mg per day. What is this in pounds? StrategyThe necessary conversion factors are derived from the equalities 1 g = 1000 mg and 1 lb = 453.6 g. Set it up using units (factor label method or dimensional analysis) mg = lbs. x ___lb___ g x ____g____ mg 2400 mg x ___1 g___ x ___1 lb___ 1000 mg 453.6 g = 0.005291 lbs.

  9. Worked Example 1.8 An average adult has 5.2 L of blood. What is the volume of blood in cubic meters? Strategy1 L = 1000 cm3 and 1 cm = 1x10-2 m. When a unit is raised to a power, the corresponding conversion factor must also be raised to that power in order for the units to cancel appropriately. 3 Solution 5.2 L × × = 5.2 x 10-3 m3 1000 cm3 1 L 1 x 10-2 m 1 cm

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