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Which of the following best describes the rule for determining the number of significant figures when using a measuring instrument?
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1. Intro to General Chemistry
Significant Figures
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How many significant figures are present in the measurement 52?
A
2
B
0
C
1
D
3
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Understand that significant figures (sig figs) are the digits in a number that carry meaningful information about its precision.
Look at the given measurement, which is 52. Since it is a whole number without a decimal point, each nonzero digit is considered significant.
Identify the digits in 52: the '5' and the '2' are both nonzero digits, so both are significant.
Count the number of significant digits: there are 2 digits (5 and 2), so the measurement has 2 significant figures.
Conclude that the correct number of significant figures in the measurement 52 is 2.
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