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# Workshop 1 Answer Key-1 - Workshop#1 Chem 1A Significant...

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Workshop #1 Chem 1A Fall 2010 Significant Figures All nonzero digits are significant All zeros to the left the first non-zero digit are not significant If the number is greater than 1 and has a decimal point, all zeros are significant (230.000 has 6 significant figures) If the number does not have a decimal point, zeros may not be significant Zeros flanked by an integer (ex. 104) are significant Multiplication/Division: the number of significant figures in the product/quotient is determined by the original number with the least significant figures Addition/Subtraction: the number of significant figures in the sum/difference is determined by the original number with the least significant figures to the right of the decimal point Exact numbers resulting from a count (5 watermelons) or from a definition can be considered to have an infinite number of significant figures Problems 1. Express -39807000 in scientific notation with the proper number of significant

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Workshop 1 Answer Key-1 - Workshop#1 Chem 1A Significant...

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