PhysioEx Exercise 7 Activity 3
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PhysioEx Exercise 7 Activity 3
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PhysioEx Lab Report
Exercise 7: Respiratory System Mechanics Activity 3: Effect of Surfactant and Intrapleural Pressure on Respiration Name: Kaiulani Franks, Kirsten Fletcher, Emran Jaber Date: 2 November 2022 Session ID: session-255e8bc7-26db-de00-f686-cfd971bef241 Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
Experiment Results
Predict Questions
Which of the following statements about surface tension is false
?
You correctly answered: Surface tension acts to increase the size of the alveoli within the
lungs.
1
Which of the following statements about surfactant is false
?
You correctly answered: Surfactant works by increasing the attraction of water molecules to
each other.
2
Just before an inspiration begins, the pressure within the intrapleural cavity
You correctly answered: is less than the pressure within the alveoli.
3
The respiratory condition of pneumothorax refers to
You correctly answered: any opening that equalizes the intrapleural pressure with the
atmospheric pressure.
4
A pneumothorax can lead to
You correctly answered: atelectasis.
5
Predict Question 1: What effect will adding more surfactant have on these lungs?
Your answer: Airflows will further increase.
1
Predict Question 2: What will happen to the collapsed lung in the left side of the glass bell jar
if you close the valve?
2
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PhysioEx Exercise 7 Activity 3
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Stop & Think Questions
Experiment Data
Airway
Radius
(mm)
Breath Rate
(breath/min)
Surfactant
Pressure Left
(atms)
Pressure
Right (atms)
Flow Left
(ml/min)
Flow
Right
(ml/min)
Total
Flow
(ml/min)
5
15
0
-4.00
-4.00
49.69
49.69
99.38
5
15
2
-4.00
-4.00
69.56
69.56
139.13
5
15
4
-4.00
-4.00
89.44
89.44
178.88
5
15
0
-4.00
-4.00
49.69
49.69
99.38
5
15
0
0.00
-4.00
0.00
49.69
49.69
5
15
0
0.00
-4.00
0.00
49.69
49.69
5
15
0
-4.00
-4.00
49.69
49.69
99.38
Your answer: The lung will reinflate over several breaths.
Why did the sequential additions of surfactant change this lung system?
You correctly answered: Surface tension was sequentially decreased.
1
Premature infants often have difficulty breathing because the amount of surfactant in their
lungs is
You correctly answered: too low.
2
What happened to the left side of the bell jar when the valve was opened?
You correctly answered: The intrapleural pressure equalized with the atmospheric pressure.
3
Did the collapsed left lung reinflate?
You correctly answered: No, it did not.
4
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Mole to Mole Stoichiometry
1) For the reaction between magnesium fluoride and lead (IV) nitrate, there are 12
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Question 3
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Species
AH° (kJ/mol) S° (J/mol·K) AƒG° (kJ/mol)
Question 4
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Mg(s)
0
32.67
0
Question 5
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Mg(OH)2(s)
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Question 4
2 pts
Yeast can produce ethanol by the fermentation of glucose (C6H12O6), which is the basis for the production of most alcoholic beverages.
C6H12O6 (aq) → 2 C2H5OH(l) +2 CO2 (g)
Question 5
1 pt
Question 6
× 2 pts
a Calculate A, H°, AS°, and A. G° for the reaction at 25 °C.
Thermodynamic Data:
Question 7
1 pt
Question 8
2 pts
Compound
C6H12O6 (aq)
AƒH° (kJ/mol) S° (J/mol K) AƒG° (kJ/mol)
.
-1260.0
289.0
-918.8
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160.7
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2 pts
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1 pt
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=
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Question 12
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=
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AG° =
=
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A chemistry student weighs out 0.300 g of citric acid (H,C H,0,), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water.
He plans to titrate the acid with 0.2000 M NAOH solution.
dlo
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7.81 mL
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1. Construct a standard curve in Excel by plotting concentration (in ppm) on your x-ax
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Nitrate Standard Curve
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Iodomethane is a common liquid used in the laboratory. It vaporizes readily. If the pressure of iodomethane vapor in a flask is 336 mm Hg at 25.0 °C
and the density of the vapor is 2.95 g/L, what is the molar mass of iodomethane?
Molar mass=
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No
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Lidocaine, a widely used local anesthetic, is available as a 0.50 %(w/v) solution for injection.
Calculate the volume of this solution that contains 90. mg of lidocaine. Be sure your answer has a unit Symbol and is rounded to the correct number of
significant digits.
X10
Explanation
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analyte
concentration(C)(mg/ml)
injection volume (ul)
elution time (time)
peak DAD signal(mAU)
caffeine
1
1
4.67
302.85
aspartame
5
1
7.53
15.83
benzoic acid
1
1
8.14
89.98
saccharin
1
1
1.91
84.86
mixture(add everything above with 1:1:1:1 ratio)
1
4.47
69.58
How to get the concentration of the mixture in this case?
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Rewrite this measurement with a simpler unit, if possible.
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4.7
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m m
Note: If you can simplify the unit at all, it may be possible to make more than one simplification. Be sure
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Amount of Water Added (milliliters)
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17. What is the pressure of a 2.25L container that hold 1.25 moles of helium at
299K? (R = 0.08206 L atm/K mol) *
%3D
40.9 atm
30.7 atm
13.6 atm
4.2 atm
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Question 1
Calculate the molarity of a solution containing 217 grams of NaCl in 747 ml of solution? (Atomic masses of Na=23 and Cl=35.5)
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What is the pressure, in kPa, exerted by 5.5 moles of O, in a 50.0L container at 30.0°C?
ОА. 325 kРa
В. 277 КРа
о С. 27.4КРа
D. 2.74 kPa
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