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Lecture 1

CHEM 107 Lecture 1: CHEM 107 - Lecture 1
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3 Pages
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Department
Chemistry
Course Code
CHEM 107
Professor
Mallory Monique Mentele

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Description
Fundamentals of Chemistry Chemists View of the World Macroscopic observe what we can see Particulate imagine what we cant see Symbolic represent communication What about numbers? Measurements involve numbers, regardless of hightech or lowtech data collection Exponents and Scientific Notation Scientific notation used to represent very large or small numbers as powers of 10 M x 10 n 5 .00002 is 2 x 10 2,000,000 is 2 x 106 For numbers greater than 10, shift the decimal point left by n places until you obtain a number between 1 and 10. For numbers less than 1, shift decimal point right until you obtain a number between 1 and 10. Positive exponent: shift right Negative exponent: shift left Significant Figures Every measure include some uncertainty Significant figures recorded digits, both certain and uncertain Rules for significance: All nonzero digits are significant: 19 Zeros between two nonzero numbers are significant
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