Lecture_4_Measurement - LECTURE NOTES LECTURE 4 Measurement...

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L E C T U R E N O T E S LECTURE 4 Measurement and Their Uncertainty (5.1, 5.4, 5.5) GENERAL CHEMISTRY Fall 2009 Updated: 11/22/2011
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5.1 Scientific Notation A. Scientific Notation 1. A method of representing very large or very small numbers 2. An expression as the product between 1 and 10 and a power of 10 a. M x 10n (1) M is a number between 1 and 10 (2) n is an integer (3) all digits in M are significant                                    Ex. 1700=1.7x10 3 B. Reducing to Scientific Notation  1. Move decimal so that M is between 1 and 10 2. Determine n by counting the number of places the  decimal point was moved a. Moved to the left, n is positive b. Moved to the right, n is negative Or it is easier to remember a. Very small numbers, n is negative b. Very large numbers, n is positive C. Mathematical Operations Using Scientific Notation  1.   Addition and subtraction a. Operations can only be performed if the exponent on each number is  the same  2.   Multiplication  a. M factors are multiplied  b. Exponents are added 3.   Division a. M factors are divided b. Exponents are subtracted (numerator - denominator)                       Example 5.1 power of 10 (positive)                       Example 5.2 power of 10 (negative) 
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Lecture_4_Measurement - LECTURE NOTES LECTURE 4 Measurement...

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