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Chemistry 151

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by: Stefanie Bennett
Stefanie Bennett

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About this Document

Example problems and key things to remember for weekly quizzes and tests!
Intro to Chemistry
Dr. Tina Palmer
Class Notes
General Chemistry
25 ?




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This 9 page Class Notes was uploaded by Stefanie Bennett on Tuesday September 6, 2016. The Class Notes belongs to CHM 151 at Maricopa Community Colleges - Glendale Community College taught by Dr. Tina Palmer in Fall 2016. Since its upload, it has received 87 views. For similar materials see Intro to Chemistry in Chemistry at Maricopa Community Colleges - Glendale Community College.


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Date Created: 09/06/16
August 25, 2016 Tuesday, August 23, 2012:12 PM Chapter 1 Page 1 Chapter 1 Page 2 August 30, 2016 Tuesday, Augu3:54 PM2016 Length: 1 inch = 2.54 cm (exactly!) Mass: 1 lb = 16 oz = 453.59 g Volume: 1 gal = 4 qt = 3.7854 L Prefix Symbol Meaning Tera- T 1 x 1012 (1,000,000,000,000) 9 Giga- G 1 x 10 (1,000,000,000) Chapter 1 Page 3 Prefix Symbol Meaning Tera- T 1 x 1012 (1,000,000,000,000) Giga- G 1 x 109 (1,000,000,000) 6 Mega- M 1 x 10 (1,000,000) Kilo- k 1 x 103 (1,000) -1 Deci- d 1 x 10 (0.1) Centi- c 1 x 10-2 (0.01) -3 Milli- m 1 x 10 (0.001) Micro-  1 x 10-6 (0.000001) -9 Nano- n 1 x 10 (0.000000001) Pico- p 1 x 10-12 (0.000000000001) Chapter 1 Page 4 Chapter 1 Page 5 September 6, 2016 Tuesday, August 30, 4:24 PM How many oxygen atoms are in 5.78 g of magnesium acetate? How many ions are in 2.50 g of CaBr ? 2 Chapter 2 Page 1 What is the mass of NO2that contains 3.56 x 10 oxygen atoms Any GAS at standard temperature and pressure (STP) occupies 22.41 L per mole 1. What volume does 2.50 grams of nitrogen gas occupy at STP? 2. How many water molecules are there in 35.7 L of water vapor at STP? Percent Composition: the mass percent of each element in a compound. “Part over whole times 100” Empirical Formula: the smallest whole number ratio of atoms in a given formula. Chapter 2 Page 2 Empirical Formula: the smallest whole number ratio of atoms in a given formula. Molecular Formula: gives the actual number of atoms in a given compound Example: C H 6 6  CH Example: A colorless liquid has a composition of 84.1% carbon and 15.9% hydrogen by mass. Determine the empirical formula. Also, assuming the molar mass of this compound is 114.2 g/mol, determine the molecular formula of this compound. Chapter 2 Page 3 Chapter 2 Page 4


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