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Unformatted text preview: The last digit in a measured number is referred to as an inexact number A number that has traileing zeros where no decimal place is indicated, if meant to represent a measured quantity, is ambiguous, and should instead be written in scientific notation Ex. 5100 g should be written as: 5.1x10^3g or 5.10x10^3g or 5.100x10^3g Rounding Round down if the left most nonsignificant digit is less than or equal to 4 Round at the very end of the problem Multiplication and Division Result carries the same number of sig figures as the number with the least sig figures Ex. 3.1870x(2.100/10.2)x5 = 3.2807 = 3.28 10.2 has the least number of sig figures therefore answer can only have 3 sig figs. Addition and Subtraction Result carries the same number of decimal places as the number with the least number of decimal places KEEP TRACK OF SIG FIGS FOR EACH STEP DURING CALCULATIONS...
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This note was uploaded on 01/26/2012 for the course CHEM 307 taught by Professor Several during the Fall '08 term at Rutgers.
 Fall '08
 Several
 Mole

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