Significant Figures - Significant Figures are the number of...

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Significant Figures  are the number of digits that express the result to the true measured precision. For example,  let's consider the number: 92.154 Determining the number of significant figures in this number is very simple. Start from the left and count the  digits. In this case we find that there are 5 significant figures in this number. Zeroes, however, are special digits. Sometimes they count as a significant digit, and sometimes they do not count  and simply act as place holders. For example, the number 0.092067 has 5 significant figures. The first two zeroes are not significant, they are just place holders. Therefore, when  you're counting significant digits always start from the left and don't start counting until you come to the first  non-zero digit, then everything after that counts, including zeroes! A good way to avoid the problem of significant and non-significant zeroes it is to use 
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This note was uploaded on 10/13/2011 for the course CHEMISTRY 121 taught by Professor Staff during the Fall '10 term at Bangladesh University of Eng and Tech.

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Significant Figures - Significant Figures are the number of...

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