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Name: Gen Chem 1 Exam 1 Study Guide
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Exam 1 Study Guide  Significant Figures Rules  Count non-zero digits from left to right  All zeros between non-zero digits count  Zeros at end are counted if decimal is present  Zeros on the left don’t count b/c there are decimal holders  Examples  Number # of Sig Figs  389 3  2008 4  238,907 6  0.08 1  0.470 3  60,000 1  Addition/Subtraction  Use fewest digits that are to the right of the decimal  Example:  16.2 + 31.289 = 47.489  47.5  Multiplication/Division  Least number of sig figs  1.23 * 2.1 = 2.583  2.6