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WELCOME BACK YOU ARE IN MRS. RENFROS ROOM PLEASE FIND A SEAT

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Administrative Matters IntroductionsIntroductions Parent LetterParent Letter AP ReviewAP Review Homework SheetHomework Sheet BooksBooks Questions?Questions?

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I DONT KNOW

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What Am I Doing Here? This course is designed to be the equivalent of the general chemistry course usually taken during the first college year. Students should attain a depth of understanding of fundamentals and a reasonable competence in dealing with chemical problems The course should contribute to the development of the students' abilities to think clearly and to express their ideas, orally and in writing, with clarity and logic. The AP Chemistry course is designed to be taken after the completion of a first course in high school chemistry.

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WHAT IS CHEMISTRY? What is chemistry? Chemistry: the study of all substances and the changes they undergo. Touches nearly all aspects of our lives…can you think of some examples? The central science: it overlaps with so many other sciences.

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AP CHEMISTRY LAB WORK We will study stuff and how it changes largely through lab work. 22 required labs and their lab write-ups At least one of your free response questions will be about lab work

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SAMPLE PROBLEMS How many sig figs in the following? 1. 123 2. 9.8000 x 10 4 3. 0.070 80 m 4. 40, 506 5. 98,000 6. 22 meter sticks 7. A students extraction procedure yields 0.0105 g of caffeine 8. A chemist records a mass of 0.050080 g in an analysis Carry out the mathematical operations, and give each result with the correct number of sig figs 9. 1.05 x 10 -3 / 6.135 10. 21 – 13.8 11.97.381 + 4.2502 + 0.99195 12. 0.14 x 6.022

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SIG FIG REVIEW How many sig figs in the following: a.12 b. 1098 c. 2001 d. 1000. e. 0.0000101 f. 1.01 x 10 -5 g. 2.001 x 10 3 Round off each to 3 sig figs, write the answer in scientific notation a.312.54 b. 0.00031254 c. 31, 254,000 d.0.31254 e. 31.254 x 10 -3

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Perform the following mathematical operations, and express each result to the correct number of sig figs a. 0.102 x 0.0821 x 273 __________________________ 1.01 b. (9.04 – 8.23 + 21.954 + 81.0) / 3.1416

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SIG FIG QUIZ Determine the number of sig figs. 1.100 2.1.0 x 10 2 3.1.00 x 10 3 4.100. 5.0.0048 6.0.00480 7.4.80 x 10 -3 8.4.800 x 10 -3

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Perform the mathematical operations and express each to the correct number of sig figs 9.97.381 + 4.2502 + 0.99195 10.171.5 + 72.915 – 8.23 11.6.022 x 10 23 x 1.05 x 10 2 12.(1.00866 – 1.00728) ________________________ 6.02205 x 10 23

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HOMEWORK 1. Youre planning on getting a new car. One model that youre considering gets 32 mi/gal of gasoline on the highway. The ugly car your parents want to buy you gets 14 km/liter. Which car has better gas mileage? Do you get your car or the ugly one? 2.You pass a road sign in your new car saying New York 112 km. If you drive at a constant speed of 65 mi/h, how long will it take you to reach New York? If your car gets (insert the best mileage from above) miles per gallon, how many liters of gasoline are necessary to travel 112 km. 3.You are in Paris and you want to buy some peaches for lunch. The sign in the fruit stand indicates that peaches are 4.00 euros per kilogram. Assuming that there are 1.14 euros to the dollar, calculate what a pound of peaches will cost in dollars.

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Warmup (5 min) 1. A 9.01 cm3 sample of gasoline has a density of 0.93 kg/cm3. Calculate the mass. d = m/v, so use m = dv m = (0.93 kg/cm3) (9.01 cm3 )

Warmup (5 min) 1. A 9.01 cm3 sample of gasoline has a density of 0.93 kg/cm3. Calculate the mass. d = m/v, so use m = dv m = (0.93 kg/cm3) (9.01 cm3 )

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