A student calculates the density of an unknown solid. The mass is 10.04 grams, and the volume is 8.21 cubic centimeters. How many significant figures should appear in the final answer?
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The general rule is that the final result should not be more accurate than the numbers used to obtain this final result. In the case of a multiplication or division, this means that the final result can't have more significant digits than the original numbers. One of the numbers has 4 significant figures, the other 3; therefore, the final result should be rounded to 3 significant figures. If more significant figures are quoted, a special note should be made that the last digits are uncertain.
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The general rule is that the final result should not be more accurate than the numbers used to obtain this final result. In the case of a multiplication or division, this means that the final result can't have more significant digits than the original numbers. One of the numbers has 4 significant figures, the other 3; therefore, the final result should be rounded to 3 significant figures. If more significant figures are quoted, a special note should be made that the last digits are uncertain.
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