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CHEM 1A (149)
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Department
Chemistry
Course
CHEM 1A
Professor
Amanda Brindley
Semester
Winter

Description
Significant Figures 1. non zeros 2. zeros between sig figs 3. zeros left of a non zero digit arenʼt significant 4. >1, zeros right of decimal are significant 5. trailing zeros arenʼt significant unless decimal/sci notation is used c. 4200 (2 sigfigs) d. 4200. (4 sigfigs) e. 4.20 x 10^3 (3 sigfigs) - addition and subtraction - use lowest number of places, decimal points (tenths, hundredths) - 11.24 + 0. 345 = 11.59 - multiplication and division - use lowest number of sig figs (12.0 + 13.04) (hund)▯ (25.04) (4 sigfigs) ------------------= ▯▯ ------------ = 0.107 (3 sigfigs, lowest amount of sigfigs) (233.42 - 0.420) (hund) (233.00) (3 sigfigs) Limiting Reagent - reactant in a chemical reaction that limits the amount of product that can be formed (stop reaction from making more product) excess reactant - r
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