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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro ISBN: 9780321809247 1

Solution for problem 39E Chapter 1

Chemistry: A Molecular Approach | 3rd Edition

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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Chemistry: A Molecular Approach | 3rd Edition

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Problem 39E

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Solution 39E All digits of a measurement including uncertain number are called significant figures. Significant figures = all certain digits + one uncertain digit The rules for determining the significant figures are (i) Zeros between nonzero digits are always significant (ii) Zeros at the beginning of a number are never significant. (iiI) Zeros at the end of a number are significant if the number has a decimal point only. Rules for rounding off the significant figures If the result contains more number of correct significant figures, then the result should be rounded off. (i) To round off the number, we have to look carefully the leftmost digit which one, we are going to be removed. (ii) If the removing leftmost digit is less than 5, then the number should be keep unchanged (iii) if the removing leftmost digit is 5 or more than 5, then the preceding number is increased by one. (a) 102.53070 Here total number of significant figures are eight. The round off the number to four significant figures is 102.5 The leftmost digit is less than 5, so it remains unchanged. 2 The exponential notation of the number...

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Chapter 1, Problem 39E is Solved
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Textbook: Chemistry: A Molecular Approach
Edition: 3
Author: Nivaldo J. Tro
ISBN: 9780321809247

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