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Concept explainers
Interpretation: The exponents for writing numbers using scientific notations in case of numbers greater and less than 1 needs to be determined.
Concept introduction: The scientific notation represents very large and very small numbers. It contains two parts one is any number between 1 and 10 (including 1 but not 10) and other is base of 10 with exponent.
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Explanation of Solution
For numbers greater than 1, the exponent can be obtained by moving decimal to the left thus; exponent will be a positive integer. Similarly, for numbers less than 1, the exponent can be obtained by moving decimal to the right thus, exponent will be a negative integer.
For example, a number greater than 1 can be 5261 here; exponent can be obtained by moving decimal to the left because the first part should be any number between 1 and 10 (including 1). The decimal will move 3 places to the left to obtain 5.261. Since, decimal is moved 3 places to the left thus, exponent will be +3.
The scientific notation for number will be
Similarly, a number less than 1 can be 0.5261. To place decimal after first non-zero digit, decimal should be moved 1 place to the right and number obtained will be 5.261. Since, the decimal is moved 1 place to right, the exponent will be -1.
The scientific notation for number will be
Chapter 5 Solutions
World of Chemistry
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