Concept explainers
SO Two students deterrmne the percen.ge of lead in a sample as a laboratory exercise Thelrue percentage is 22 52% The s.dentsr resul. ler three determinations are as fellows
1 22 52, 22 413, 22 54
220422 58,2262
a Calculate Me average percentage for each set of data and sta. which set is the more accurate based on .e average
b Precision can be Judged by examinrng the average of the devrahons from the average value for that da. (CalcAare the average value for each,. set then calculate the average aue of the absolute deviations of each measurerne. from the average ), Which.. more Precrse9
To determine: The average value of deviation for each set of given data; the set that is more précised.
Answer to Problem 1DE
Solution: The average value of deviation for set
Explanation of Solution
Given The true average value is
The values in set 1:
The values in set 2:
The average deviation can be determined by addition of the differences of all numbers and average of all numbers; and further dividing the outcome by the number of items present in that list.
The average deviation of set
The average deviation of set
Both the sets set
Precision is the comparison of closeness of two or more measurements with each other. The set
Want to see more full solutions like this?
Chapter 10 Solutions
Chemistry: The Central Science (13th Edition)
- 1. Convert 168 nm3 to ft3. a.5.93 x 10exp-16 ft^3b.5.93 x 10exp-24 ft^3c.5.22 x10exp22 ft3d.6.00 x10exp-15 ft3arrow_forwardObtain values from the pictures found in the procedure to complete the data table below.Remember to include units!A. Data: 4 Mass graduated cylinder + HCl(aq)5 Mass empty graduated cylinder6 Mass HCl(aq) usedarrow_forwardShttps x O Class x A Signif x Р Сорy х D News x X Edger x C Cleve x O SeeRe X Copy its itslea x assroom.google.com/u/0/c/MJMZNZQ0MJAZMTY4/a/MJUOMDE3NDC0OTYZ/details USATestprep, LLC-. Fgnificant digit rules practice.docx Open with Google Docs Significant digit rules practice Give the number of significant digits in each of the following measurements: 1. 82378.50 7. 9.0092 13. 43.050 2. 4250000 8. 823.012 14. 0.147 3. 910027.00 9. 0.005789 15. 6271.91 4. 0.0053567 10. 6.60 16. 6 5. 6703 11. 342000. 17. 3.47 6. 0.00730 12. 2653008.0 18. 387465arrow_forward
- EJIYZPROfspoHcK3uA&lv=HbAhnaEn7foZmyeo a hjkml,/t[plkojihug. N Nitro Type | Compe.. E 3:28 Now playing. e QBA2 2020-2021 DO 12 13 14 15 16 17 18 19 20 21 21 of 21 Raymond went to the grocery store with his mom. He started by pushing an empty grocery cart with 0 kg of mass. As the shopping trip progressed, the cart increased in mass from 0 kg to 10 kg. Which argument below supports Raymond's claim that it was more difficult to push the 10 kg cart as opposed to the empty cart. O As the cart decreased in mass, Raymond had to use more force to push the cart. O As the cart increased in mass, Raymond had to use more force to push the cart. O As Raymond continued to push the cart during the duration of the trip, he became tired which made it more difficult to push the cart. O As Raymond continued to push the cart during the duration of the trip, friction began to build up on the wheels causing the cart to be more difficult to push.arrow_forwardA gravimetric analysis of silver in a sample X was performed three times. The result of the students for the mass of silver were 0.2351g, 0.2361g, and 0.2341g. The "true value" for the mass of silver is 0.5211g. Check all that applies! The percent error from the true value is 55% O The precision of the gravimetric analysis was very bad, i.e. the results are unacceptable. The mean value is 0.24g The RSD is 0.4g The percent error from the true value is 54.88% The mean value is 0.2351g The RSD is 0.43% The precision of the gravimetric analysis was good.arrow_forwardIf Obje Ct has a den S.'ty Of 8.65 g/cn?. an What is i+S den Sity in Of Kalo" Kg/m³ unitsarrow_forward
- Please make sure it is 3 sig figs!! the answers must be numbers.arrow_forwardObtain values from the pictures found in the procedure to complete the data table below.Remember to include units!A. Data:1 Mass empty beaker2 Mass beaker + Na2CO33 Mass Na2CO3 used4 Mass graduated cylinder + HCl(aq)5 Mass empty graduated cylinder6 Mass HCl(aq) used7 Total mass before rxn: beaker + Na2CO3 + HCl(aq)8 Mass beaker + salt solution after reaction9 Mass of CO2 generated by the reaction10 Mass of beaker + NaCl (after drying)11 Mass of NaCl Generatedarrow_forwardQ1. Which student collected the most accurate data? Q2.Who collected the most precise data?arrow_forward
- Inbc X (531 X Con X I Bala X Ans X Inbc X CHE X 101 Che X С Ч-С х b My x Unk X Sea X E I ma X app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 7 of 40 Submit Which of the following compounds can form intermolecular hydrogen bonds? A) CH4 B) H2Se C) NH3 D) H2 E) All of these compounds can form hydrogen bonds. 10:36 AM e Type here to search 64°F 小 8/26/2021 (8)arrow_forwardCarry out each calculation and report the ans wer us 19 :·.,proper number of significant figures.65.2/12arrow_forwardis it possible for the calculated answer from a mulitplication or divison problem to contain more signficant figures than the measurements used in calculation? Explain is it posstible for the calculated answer from an additon or subtraction to contain more signifcant figures than the measurement used in calculation? explainarrow_forward
- Introductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage LearningWorld of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning