How do you determine the number of significant figures to keep in an answer obtained by multiplying or dividing? report the answer with the same number of significant figures as the measured number with the highest significant figures use the calculator value report the answer with the same number of decimal places as the measured number with the fewest decimal places report the answer with the same number of significant figures as the measured number with the fewest significant figures

How do you determine the number of significant figures to keep in an answer obtained by multiplying or dividing? report the answer with the same number of significant figures as the measured number with the highest significant figures use the calculator value report the answer with the same number of decimal places as the measured number with the fewest decimal places report the answer with the same number of significant figures as the measured number with the fewest significant figures

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter2: Measurements And Calculations

Section: Chapter Questions

Problem 30QAP: In lab you report a measured volume of 158.6 mL of water. Using significant figures as a measure of...

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Correct any answers that have the incorrect number ofsignificant figures.(a) (908.4 - 3.4) , 3.52 * 104 = 0.026(b) (1206.7 - 0.904) * 89 = 1.07 * 105(c) (876.90 + 98.1) , 56.998 = 17.11(d) (4.55 , 407859) + 1.00098 = 1.00210
How do you determine the number of significant figures to keep in an answer obtained by multiplying or dividing? A. Report the answer with the same number of decimal places as the measured number with the fewest decimal places B. Report the answer with the same number of significant figures as the measures number with the highest significant figures C. Report the answer with the same number of significant figures as the measured number with the fewest significant figures D. Use the calculator value
In lab you report a measured volume of 158.6 mL of water. Using significant figures as a measure of the error, what range of answers does your reported volume imply? Choose the best answer and justify your choice. 100200 mL 150160 mL 158159 mL 158.5158.7 mL 158.59158.6l mL
What is the uncertainty, in terms of a power of 10, associated with each of the following measured values? a. 4.30 102 b. 4.300 101 c. 4.3 103 d. 4.300 105
Is the use of significant figures in each of the following statementsappropriate? (a) The 2005 circulation of National Geographicwas 7,812,564. (b) On July 1, 2005, the populationof Cook County, Illinois, was 5,303,683. (c) In the UnitedStates, 0.621% of the population has the surname Brown.(d) You calculate your grade point average to be 3.87562.
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Express these non-exponentially, and choose the unit and prefix that works best: 1.9 x 10^-4 l 4 x 10^-3 s 6.5 x 10^-8 g a. 1.9 ml; 4 ms; 65 ng b. 0.19 ml; 4 ms; 65 mg c. 0.19 ml; 40 ms; 65 g d. 0.19 ml; 4 ms; 65 ng e. 0.19 ml; 4 ms; 0.65 g
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To identify a liquid substance, a student determined itsdensity. Using a graduated cylinder, she measured out a 45-mLsample of the substance. She then measured the mass of thesample, finding that it weighed 38.5 g. She knew that the substancehad to be either isopropyl alcohol 1density 0.785 g>mL2or toluene 1density 0.866 g>mL2. What are the calculated densityand the probable identity of the substance?
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You are asked to determine the mass of a piece of copper using itsreported density, 8.96 g/mL, and a 150-mL graduated cylinder.First, you add 105 mL of water to the graduated cylinder; thenyou place the piece of copper in the cylinder and record a volumeof 137 mL. What is the mass of the copper reported with the correctnumber of significant figures? (a) 287 g (b) 3.5 * 10-3 g/mL(c) 286.72 g/mL (d) 3.48 * 10-3 g/mL (e) 2.9 * 102 g/mL