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Inquiries,
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Bridging
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BP012
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Week
6:
Methods
of
Research
(Part
Il)
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Assignment
005
e
It
deals
with
the
past.
Correct
Mark
1.00
out
of
Select
one:
1.00
O
a.
Correlational
study
"
Flag
question
O
b.
Follow
up
study
®
c.
Ex
post
facto
research
O
d.
Trends
and
projection
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my
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ESF X
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Question 5 (1 point)
Ben starts walking along a path at 3 mi hr¹. Amanda starts jogging along the same path 1 hour later at 5 mi hr. After how much
time jogging does Amanda catch up to Ben?
3.5 hr
2.5 hr
2 hr
16
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1. Research on the limitation of accuracy of the following instruments:
• analytical balance
• top-loading balance
• serological pipette
• graduated cylinder
• burette
• volumetric flask
• Erlenmeyer flask
• beaker
2. Define the term, "measurement uncertainty". Among the instruments listed above, which
ones have the highest uncertainty? Which ones have the lowest?
3. Based on the measurement uncertainty of the above instruments, which instruments would
yield the lowest percent error?
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&
Spring 2023 CHEM 1411 14 General Chemistry I LAB
Experiment 2 Postlab
57 minutes remaining
Postlab Content
Page 3 of 6
Question 2
An object with a mass of 47.2 kilograms and a volume of 47.6 liters. Find the density with units of g/cm³. Report your answer
with three significant figures.
Add your answer
Questions Filter (5)
5 OF 5 QUESTIONS REMAINING
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2/23/23
X
✓
• You
after
76°F
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Attem
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Sa
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A quia.com/quiz/7898892.html?AP_rand%3D1784472953
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201208 Assessment for Scoutlier Significant Figures Calculations
Go to 1 - Not answered v
Go
stion 1 of 20
1. When expressed as 7.5x10^4, only the significant figures of
are to.be considered.
(1 point)
O 7.5
7.05
O 7.005
O None of the, above
Submit answer
Skip for now
Save progress or end quiz
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Help
100% 4A
To
Public Health Ch x
* HSC 258 - Major Projec X
MindTap - Cengage Lea X
C The Illustration To TH
d%=55750828934189288909969212&elSBN=9781305657571&id=D1061392007&nbld=21... *
Q Search th
References
Use the References to access important values if needed for this question.
For the following reaction, 24.7 grams of sulfur dioxide are allowed to react with 9.95 grams of oxygen
gas .
sulfur dioxide(g) + oxygen(g)
→ sulfur trioxide(g)
What is the maximum mass of sulfur trioxide that can be formed?
grams
What is the FORMULA for the limiting reagent?
grams
What mass of the excess reagent remains after the reaction is complete?
Submit Answer
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M9. Readings
* OWLV2 | Assig X MindTap - Cen x
g.cengage.com/static/nb/ui/evo/index.html?elSBN=9781337790840&id%3D299783426&snapshotld-785765&
MindTap- Cen x
G amu of ca-G x
b My Question x +
CENGAGE MINDTAP
Chapter 8: Chemical Composition
L.
E AA
Tools
Problems
45. Calculate the percent by mass of each element in the following compounds.
a. HC103
b. UF4
с. СаН2
d. Ag,S
e. NaHSO3
f. MnO2
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Categorize each as a determinate or an indeterminate error and further
classify determinate errors as instrumental, method or personal.
a) An unknown sample being weighed is hygroscopic.
b) One component of a mixture being analyzed quantitatively by GC
reacts with the column packing.
c) A radioactive sample being counted repeatedly without any change in
condition yields a slightly different count at each trial.
d) The tip of the pipet used in the analysis is broken.
e) In measuring the same peak heights of a chromatogram, two
technician each report different heights.
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M9. Readings X
* OWLV2 | Assig X
* MindTap - Cen X
MindTap - Cen X
G amu of ca - Go X b My Questions
engage.com/static/nb/ui/evo/index.html?elSBN=9781337790840&id%3D299783426&snapshotld%3D785765&
C
<<
CENGAGE MINDTAP
Q Search this cour
Chapter 8: Chemical Composition
ž AA A
Answer +
47. Calculate the percent by mass of the element listed first in the formulas for each of the following
compounds.
a. methane, CH4
b. sodium nitrate, NaNO3
c. carbon monoxide, CO
d. nitrogen dioxide, NO2
e. 1-octanol, Cg H18 O
f. calcium phosphate, Caz (PO4)2
g. 3-phenylphenol, C12 H10O
h. aluminum acetate, Al(C,H,02),
48. Calculate the norgont h
!!
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#7
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With explanation please
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Section 3 part B
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50
Percentage
Red No. 40 Soln
100%
80%
60%
40%
Table 4.1: Dilutions of Red No. 40 & Absorbance
Volume of Red No. 40
Soln (mL)
10me
8mL
опи
4mL
Percentage
Red No. 40 Soln
100%
80%
60%
40%
20%
Volume of DI Water
(mL)
OML
2mL
LIML
M
UML
8ML
Table 4.2: Dilutions of Red No. 40 & Absorbance
Concentration Red No. 40
2. Report the wavelength with the maximum absorbance of Red No. 40 dye.
Absorbance
20%
2ML
Part A: Making a Calibration Curve for Beer's Law
1. Calculate the concentrations of each of your diluted Red No. 40 solutions and add these to Table 4.2. Show
at least one sample calculation in the space below.
0.251
0.192
Total Volume
0.181
0·119
0.060
(mL)
10 mL
10 mL
10 mL
10 mL
10 mL
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Sample IdentificationCodeConcentration of M%TA=2-log(%T)Q50004.00 x 10-417.90.75Q50013.20 x 10-425.00.6Q50022.40 x 10-435.70.46Q50031.60 x 10-450.20.3Q50048.000 x 10-570.80.15SampleIdentificationCode%TA=2-log(%T)AMQ0210150143.70.359518560.360.000192Q0210150244.10.355561410.360.00018Q0210150343.80.358525890.360.00017Q0210150444.10.355561410.360.00018Q0210150543.80.358525890.360.00017What was their percent error?43%Does Batch 021015 meet legal requirements?No, because it is not between 2.85 * 10(4) and 3.15 * 10(4)Well #DropsBluedye1234567891012345678910Drops 9Distilled water876543210Concne 0.26tration0.52Test Tube #0.781.041.3Solutions3Concentration (M)2.082.32.6Concentration (ppm)1:1 dilution11.82Starting Dilution21.562:1 dilution0A.Zero standard0Was your calibration curve as linear as you expected?B.Did you experience any “drift†of the resistance readings?C.What is the equation of your best-fit line?D.What commercial drink did you analyze?E.Assuming…
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Ab GL B
art 3 SHOW WORK
ond Shipp: Attempt 1
Hu/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2l?ou=5956136&isprv=&drc=0&qi=5726766&cfql=
Answer
units
▷ Add attachments to support your work
Question 4 (0.5 points)
SHOW YOUR WORK.
G
**N*-*OO
If 35.45 mL of 0.8121 M sodium carbonate solution reacts with excess lead (III)
nitrate solution to form aqueous sodium nitrate and solid lead (III) carbonate, how
many grams of lead (III) carbonate is formed?
On your paper with your name and date:
1. Go from ionic compound name to formula (review Chp 5 as much as needed)
2. Balance the equation (review Chp 7 if needed).
3. Do the calculation showing ALL units, just like I did in solution stoichiometry
lecture.
a #
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- ESF X empt/quiz_start_frame_auto.d21?ou=9739790&isprv=&qi=11007766&cfql=0&dnb=0&fromQB=0&inProgress=1 ystems Question 5 (1 point) Ben starts walking along a path at 3 mi hr¹. Amanda starts jogging along the same path 1 hour later at 5 mi hr. After how much time jogging does Amanda catch up to Ben? 3.5 hr 2.5 hr 2 hr 16arrow_forward1. Research on the limitation of accuracy of the following instruments: • analytical balance • top-loading balance • serological pipette • graduated cylinder • burette • volumetric flask • Erlenmeyer flask • beaker 2. Define the term, "measurement uncertainty". Among the instruments listed above, which ones have the highest uncertainty? Which ones have the lowest? 3. Based on the measurement uncertainty of the above instruments, which instruments would yield the lowest percent error?arrow_forward& Spring 2023 CHEM 1411 14 General Chemistry I LAB Experiment 2 Postlab 57 minutes remaining Postlab Content Page 3 of 6 Question 2 An object with a mass of 47.2 kilograms and a volume of 47.6 liters. Find the density with units of g/cm³. Report your answer with three significant figures. Add your answer Questions Filter (5) 5 OF 5 QUESTIONS REMAINING K First Last > Continue Details & In PER Assessm 2/23/23 X ✓ • You after 76°F Time li 60 min Attem 2 atte Grading Saarrow_forward
- A quia.com/quiz/7898892.html?AP_rand%3D1784472953 UIA FAQ About Log in Subscribe now 30-day free trial Home 201208 Assessment for Scoutlier Significant Figures Calculations Go to 1 - Not answered v Go stion 1 of 20 1. When expressed as 7.5x10^4, only the significant figures of are to.be considered. (1 point) O 7.5 7.05 O 7.005 O None of the, above Submit answer Skip for now Save progress or end quizarrow_forwardHelp 100% 4A To Public Health Ch x * HSC 258 - Major Projec X MindTap - Cengage Lea X C The Illustration To TH d%=55750828934189288909969212&elSBN=9781305657571&id=D1061392007&nbld=21... * Q Search th References Use the References to access important values if needed for this question. For the following reaction, 24.7 grams of sulfur dioxide are allowed to react with 9.95 grams of oxygen gas . sulfur dioxide(g) + oxygen(g) → sulfur trioxide(g) What is the maximum mass of sulfur trioxide that can be formed? grams What is the FORMULA for the limiting reagent? grams What mass of the excess reagent remains after the reaction is complete? Submit Answerarrow_forwardM9. Readings * OWLV2 | Assig X MindTap - Cen x g.cengage.com/static/nb/ui/evo/index.html?elSBN=9781337790840&id%3D299783426&snapshotld-785765& MindTap- Cen x G amu of ca-G x b My Question x + CENGAGE MINDTAP Chapter 8: Chemical Composition L. E AA Tools Problems 45. Calculate the percent by mass of each element in the following compounds. a. HC103 b. UF4 с. СаН2 d. Ag,S e. NaHSO3 f. MnO2arrow_forward
- Categorize each as a determinate or an indeterminate error and further classify determinate errors as instrumental, method or personal. a) An unknown sample being weighed is hygroscopic. b) One component of a mixture being analyzed quantitatively by GC reacts with the column packing. c) A radioactive sample being counted repeatedly without any change in condition yields a slightly different count at each trial. d) The tip of the pipet used in the analysis is broken. e) In measuring the same peak heights of a chromatogram, two technician each report different heights.arrow_forwardHelp me fill this out! No AI for ORGO labarrow_forwardM9. Readings X * OWLV2 | Assig X * MindTap - Cen X MindTap - Cen X G amu of ca - Go X b My Questions engage.com/static/nb/ui/evo/index.html?elSBN=9781337790840&id%3D299783426&snapshotld%3D785765& C << CENGAGE MINDTAP Q Search this cour Chapter 8: Chemical Composition ž AA A Answer + 47. Calculate the percent by mass of the element listed first in the formulas for each of the following compounds. a. methane, CH4 b. sodium nitrate, NaNO3 c. carbon monoxide, CO d. nitrogen dioxide, NO2 e. 1-octanol, Cg H18 O f. calcium phosphate, Caz (PO4)2 g. 3-phenylphenol, C12 H10O h. aluminum acetate, Al(C,H,02), 48. Calculate the norgont h !!arrow_forward
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Recommended textbooks for you
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning