PostLab Data Summary
Note : some questions will display a variable like "nCount" or "SyInput" instead of an actual
number in the data summary.
Q#
Question Text
4)
Data Entry  No Scoring.
When you used the volumetric pipet to determine the density of water, what was the volume of water in
milliliters delivered by your pipet for a single trial?
Report your value to 4 significant figures.
Volume (mL) =
Your Answer:
10
No Points Possible
5)
Data Entry  No Scoring.
For each of your three acceptable trials, what was the measured mass in grams of water delivered by your
10.00 mL pipet?
Report your results to 4 significant figures, e.g 9.988 or 1.008.
Your Answer:
9.96
No Points Possible
Your Answer:
9.9670
No Points Possible
Your Answer:
9.9050
No Points Possible
6)
Scoring Scheme: 3321.
For each of your three acceptable trials, what was the density of water that you determined with your 10.00
mL pipet?
Report your results to 4 significant figures,
e.g.
0.9988 or 1.008
Your Answer:
0.9960
You Scored
3
points out of
3
Possible
Your Answer:
0.9967
No Points Possible
Your Answer:
0.9905
No Points Possible
7)
Scoring Scheme: 3321.
Using the data for your three trials, what is the average value of the density of water that you obtained
using your 10.00 mL pipet?
Report your results to 4 significant figures, e.g. 0.9984 or 1.008
d
average
(g/mL) =
Your Answer:
0.9944
You Scored
3
points out of
3
Possible
8)
Scoring Scheme: 3321.
Using the data for your three trials, what is the standard deviation of your data?
Report your result to two significant figures, e.g 0.00032
Standard Deviation (g/mL) =
Your Answer:
0.0039
You Scored
3
points out of
3
Possible
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9)
Scoring Scheme: 3321.
Using the data for your three trials, what is the 90% confidence limit of your data?
Report your result to two significant figures, e.g 0.0032
Confidence limit (g/mL) =
Your Answer:
0.0038
You Scored
3
points out of
3
Possible
10) Data Entry  No Scoring.
What was the temperature of the room and the temperature of the water, to the closest degree Celsius,
when you made your measurements for this laboratory?
Temperature (
o
C) =
Your Answer:
21
No Points Possible
11) Data Entry  No Scoring.
Referring to Table I in your laboratory manual for this experiment, what is the accepted value for the
volume of 1 gram of water at the temperature of the room you reported in the last question? Report 5
significant figures here.
Volume (mL) =
Your Answer:
1.0030
No Points Possible
12) Scoring Scheme: 3321.
Using the accepted value for the volume of 1 gram of water at the temperature of the room that you
reported above, what is the accepted value for the density of water?
Report your result to 4 significant figures, e.g. 0.9997.
Density (g/mL) =
Your Answer:
0.9970
You Scored
2
points out of
3
Possible
13) Scoring Scheme: 3221.
Using the value for the average density of water that you determined using your 10.00 mL pipet and the
accepted value for the density of water at the temperature at which you performed these measurements,
calculate the relative error in the density you determined with your 10.00 mL pipet.
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 Winter '08
 tingguo
 data entry, Scoring Scheme

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