CHE-1101 Lecture Notes - Lecture 4: Scientific Notation, Conversion Of Units Of Temperature
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Adding and subtracting numbers in exponential (scientific notation) form. Must convert to the same power of n (the exponent) You can convert either one, but it"s easier to make the smaller power bigger. Keep track of significant figures as you go. Examples: (37. 10 32. 00) / 1. 8000: do subtraction first and mind the decimals. 5. 10 / 1. 8000 : do the division second and mind the sfs in each number (numerator. = 2. 83 (3sf like numerator) (45 x 78) (2,813 * 12. 1) Different sig fig rules for temperature: the number of decimals in the starting temperature must equal the number of decimal places in the final temperature. Conversion equations: celsius to fahrenheit and vice versa: Tc = (tf 32 f) * (5 c/9 f: celsius to kelvin: Tk = (tc + 273. 15: you must convert to celsius to get fahrenheit from kelvin and vice versa. Make sure original unit can be cancelled out, leaving you with desired unit.
