CHEM 120A - Exam 1 Review

CHEM 120A - Exam 1 Review - CHEM 120A Autumn 2011 Review...

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CHEM 120A – Autumn 2011 Review for Exam 1 Chapter 1 – Measurements Section 1.1 – Units of Measurement - Write the names and abbreviations for the units used in measurement of mass, length and volume. - Know differences between metric and SI systems - Be able to identify the type of measurement given a number with a unit - Extra Exercises: 1.1, 1.3 Section 1.2 – Scientific Notation - Be able to express numbers in scientific notation - Be able to convert scientific notation to a standard number - Extra Exercises: 1.5, 1.7, 1.9 Section 1.3 – Measured Numbers and Significant Figures - Know the difference between a measured number and an exact number - Know how to determine the number of significant figures in a measured number - Be able to determine if zeros in a number are significant - Extra Exercises: 1.13, 1.15, 1.17, 1.19, 1.21 Section 1.4 – Significant Figures in Calculations - Be able to adjust calculated answers to the correct number of significant figures - Know the rules for rounding off - Know how to determine the correct number of significant figures when performing multiplication and division - Know how to determine the correct number of significant figures when performing addition and subtraction - Be able to express an answer with the correct number of significant figures when performing combined mathematical functions (i.e. addition and multiplication) - Know when it is necessary to add significant zeros - Extra Exercises: 1.23, 1.27, 1.29 Section 1.5 – Prefixes and Equalities - Be able to use numerical values of prefixes to write a metric equality

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- Memorize the prefixes (their numerical value, scientific notation, equality and symbol) that we will commonly encounter in this course: mega, kilo, deci, centi, milli, micro, and nano - Know how to write equalities - Extra Exercises: 1.35, 1.37, 1.37, 1.39, 1.41 Section 1.6 – Writing Conversion Factors - Be able to write conversion factors for two units that describe the same quantity - Memorize the metric-U.S. equality: 1 in = 2.54 cm - Know how to write metric conversion factors - Be able to write conversion factors that are stated in a problem - Know what is meant by ppm, ppb and percentage and be able to write these as conversion factors - Extra Exercises: 1.45, 1.47, 1.49 Section 1.7 – Problem Solving - Be able to use conversion factors to change from one unit to another - Extra Exercises: 1.51, 1.53, 1.55, 1.57, 1.59, 1.61 Section 1.8 – Density - Be able to calculate the density of a substance given mass and volume - Be able to use volume displacement data to calculate density - Know what is meant by specific gravity and be able to solve problems with specific gravity - Be able to use the density of a substance to calculate mass of volume of a substance - Extra Exercises: 1.63, 1.65, 1.67, 1.69 Additional Exercises – Chapter 1 - 1.71, 1.73, 1.77, 1.79, 1.81, 1.83, 1.85, 1.89, 1.91, 1.93, 1.97, 1.99, 1.105, 1.107, 1.109
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CHEM 120A - Exam 1 Review - CHEM 120A Autumn 2011 Review...

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