CHEM 130 Chapter Notes - Chapter R: Elution, Decimal Mark, Scientific Notation
11 Sep 2018
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Leading zeros are zeros that precede all the nonzero digits. These do not count as significant figures: captive zeros are zeros are zeros between nonzero digits. These always count as significant figures : trailing zeros are zeros at the right end of the number. They are significant only if the number contains a decimal point: exact numbers. Fewer zeros are needed to write a very large or very small number: rules of significant figures in mathematical operations. For multiplication or division, the number of significant figures in the result is the same as the number in the least precise measurement used in the calculation. For addition and subtraction, the result has the same number of decimal places as the least precise measurement used in the calculation: note that for multiplication and division, significant figures are counted. For addition and subtraction, the decimal places are counted: rules for rounding:
