SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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good precision
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poor precision
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Either A or B
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None of the above
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Detailed explanation-1: -The measurement 0.0255 g, rounded off to two significant figures, would be a. 0.02 g.
Detailed explanation-2: -400 mL. The zeros in 400 mL are not present before or after a decimal point. In addition, the zeros are not trapped between non-zero digits. As such, both zeros are non-significant.
Detailed explanation-3: -Determining the Number of Significant Figures The number of significant figures in a measurement, such as 2.531, is equal to the number of digits that are known with some degree of confidence (2, 5, and 3) plus the last digit (1), which is an estimate or approximation.
Detailed explanation-4: -By using significant figures, we can show how precise a number is. If we express a number beyond the place to which we have actually measured (and are therefore certain of), we compromise the integrity of what this number is representing.