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Exam 1 Study Guide

by: Meredith Bean

Exam 1 Study Guide 70058 - CHEM 211 - 002

Meredith Bean
GPA 3.28

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About this Document

Quick outline of what to study including sample problems from the ACS Exam Study Guide, helpful tables from past chapters, reminders of important details, and references to what chapters to study. ...
General Chemistry I
Paul David Cooper (P)
Study Guide
General Chemistry
50 ?




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This 5 page Study Guide was uploaded by Meredith Bean on Tuesday February 23, 2016. The Study Guide belongs to 70058 - CHEM 211 - 002 at George Mason University taught by Paul David Cooper (P) in Fall 2015. Since its upload, it has received 42 views. For similar materials see General Chemistry I in Chemistry at George Mason University.


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Date Created: 02/23/16
EXAM 1 Study Guide Exam Dates: (2/24­2/27) in Planetary Testing Center States of matter Sample Problem:  Think: Solutions are homogeneous mixtures of two or more substances. Since (I) and (III) only  represent one type of molecular particle, they cannot be a solution. There may be two different  types of particles in (II), however they are not homogeneously mixed and appear to be in separate layers. Therefore, (IV) is the best example of a solution. Temperature: Be able to convert between Celsius, Kelvin, and Fahrenheit!! Density = Mass/Volume Know significant figure rounding (Chapter 1), be able to put into scientific notation  Significant Zeroes  Multiplication and Division: Go by fewest number of sig figs from values given in problem  Addition and Subtraction: Go by fewest number of digits from values given in problem Unit conversions – Know your prefixes! Molarity: Molar mass, mass ratio  Sample Problem: A solution is made by dissolving 60 g of NaOH (M= 40 g/mol) in enough  distilled water to make a 300 mL of a stock solution. What volumes of this solution and distilled  water, when mixed, will result in a solution that is approx. 1 M NaOH? Calculating Molecular mass – Be  friends with your Periodic Table! Isotopes, be able to calculate  proton/neutron/electron counts  Sample 54oblem 1: Whi54 pair represents isotopes? a)   24Cr  and  26e 235 238 b) 92  and  92 148d 150n c)  and  239 239 d) 93p  and  94Pu  Think: Isotopes are forms of the same element that differ only in the number of neutrons in the  nuclei. Bottom subscript represents number of protons, determines identity of the element. 56X  Sample Problem 2: Which element is represented by  24  ? a) Iron b) Germanium c) Barium d) Chromium   Go to Periodic table and find element with atomic number of 24, also corresponding to number of protons. Atomic mass being 54 on the Periodic table should not deter you – this means its an  isotope. Balancing molecules and equations  Every molecule (i.e. H2O) has to be balanced in charge. There are two H atoms for every O atom  so the overall compound has a net charge of 0 Naming compounds (Chapter 2)  ­ic, ­ous, ­ate, ­ite Limiting Reactants (Chapter 3) Helpful resources: Practice exam on Blackboard, Previously posted Chapter notes (1­3), Homework  assignments, Learnsmart


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