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17 Nov 2019

The pressure gauge is used the pressure of water flow at point A. If the pressure at B is 87 kPa, estimate the pressure at A in kPa. Assume all fluids are at 20 degrees celsius. ans: P_A=96.4 kPa

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Fig. 9 is used the pre t A in kPa. Assume all fluids are at 20Â°C. sed the pressure of water flow at point A. IH SAE 30 oil Gage B 6 cm Mercury 5 cm Water flow 1t cm 4 cm Fig. 9

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Question 21 pts

Which example is the greatest pressure?

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760 mm Hg (= 760 torr)

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Question 31 pts

Which example is the greatest pressure?

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Question 41 pts

Assuming all other variables are held constant, a graph of which of the following will NOT yield a straight line?

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Question 51 pts

A sealed vessel contains 0.250 mol of oxygen gas. Which of the following will result in a decrease in the pressure of the oxygen gas?

increasing the number of moles of oxygen

increasing the temperature of the vessel

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Question 61 pts

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Question 71 pts

Which set of units for P, V, and T can be used for combined gas law calculations?

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Question 81 pts

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Question 91 pts

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Question 101 pts

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Question 111 pts

Which statement is NOT true according to the ideal
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i need answers of all the 12 questions. plz provide steps as well

A mixture of H_2(g) and NH_3(g) has a volume of 139.0 cm^3 at 0.00 degree C and 1 atm. The mixture is cooled to the temperature of liquid nitrogen, at which ammonia freezes out and the remaining gas is removed from the vessel. Upon warming the vessel to 0.00 degree C and 1 atm, the volume is 77.4 cm^3. Calculate the mole fraction of NH_3 in the original mixture. A vessel contains 1.15 g of H_2O(I) in equilibrium with vapor at 30 degree C. At this temperature, the vapor pressure of H_2O is 31.82 torr. What will the volume be when all the water evaporates at this temperature? A rigid vessel of volume 0.400 m^3 containing H_2 at 21.25 degree C and a pressure of 715 times 10^3 Pa is connected to a second rigid vessel of volume 0.750 m^3 containing Ar at 30.15 degree C at a pressure of 203 times 10^3 Pa. A valve separating the vessels is opened and both are cooled to a temperature of 12.2 degree C. What is the final pressure in the vessels? An electric heater is immersed in a flask containing 150 g of ethanol and a current of 1.12 A is applied from a 12.5 V power supply for 172 s. Estimate the rise in the temperature of ethanol. Consider heating 1 kg of H_2O (i) by 10 degree C using each of the following methods a. Heat with a mechanical eggbeater that is powered by a 1-kg mass on a rope over a pully. How far does the mass have to descent in the earth's gravitational field to supply enough work? b. Make a charcoal fire. How much charcoal (graphite) must you burn? A homeowner uses 4.00 times 10^3 m^3 of methane (at 1.00 atm and 20 degree C) in a year to heat a home. How many grams of methane are used during this time period to heat the home? Consider a sample of a perfect gas whose temperature is -33.0 degree C and volume is 0.0250L. What temperature is required to change the volume to 66.9 cm^3? Hydrogen gas is used in weather balloons because it is less expensive than helium. Assume that 5.57 g of H_2 is used to fill a weather balloon to an initial volume of 67 L at 1.04 atm. If the balloon rises to an altitude where the pressure is 0.047 atm, what is the new volume? Assume that the temperature remains constant. The atmospheric surface pressure on Venus is 90 bar and is composed of 96% CO_2 and approximately 4% various other gases. Given a surface temperature of 730K, what is the mass of CO_2 present per cubic centimeter at the surface? A sample of propane (C_3H_8) is placed in a closed vessel together with an amount of O_2 that is 2.15 times the amount needed to completely oxidize the propane to CO_2 and H_2O at constant temperature. Calculate the mole fraction of each component in the resulting mixture after oxidation, assuming that the H_2O is present as a gas An initial step in the biosynthesis of glucose C_6H_12O_6 is the carboxylation of pyruvic acid CH_3COCOOH(s) to form oxaloacetic acid HOOCCOCH_2COOH: CH_3COCOOH(s) + CO_2(g) rightarrow HOOCCOCH_2COOH(s) What volume of CO_2 is required to produced 1.10 g of glucose? Assume p = 1.00 atm and T = 298 K. In an experiment to measure the molar mass of a gas, 250 cm^3 of the gas was confined to a glass vessel. The pressure was 152 torr at 298 K and the mass of the gas was 33.5 mg. What is the molar mass of the gas?

Multiple Choice questions 2 points each

1. Creatinine clearance is a commonly used estimate of:

A)Glomerular filtration rate (mL/min)

B)Tubular secretion (mL/min)

C)Total renal blood flow (mL/min)

D)Renal reabsorption (cc/min)

E)Steady state muscle breakdown rate (mcg/min)

2. Which of the following is not a measure of exposure?

a) Peak concentration

b) Time of maximum concentration

c) Area under the concentration time curve

d) Concentration measured 2 hours after dose administration

3. A clinically impactful drug interaction based upon inhibition of cytochrome P450 is most likely when:

a)The drug is metabolized by multiple enzymes

b)The drug has a narrow therapeutic index

c)There is limited variation in interindividual enzyme activity in the involved enzyme

d)The drug is a substrate of P-glycoprotein

e)All of the above

2. Why are dose-response (or concentration-response) analyses recommended for drug approval by a regulatory agency?

a) To increase the potential for adverse reactions in clinical trials in order to fully characterize the safety profile

b) To prolong the length of time it takes for drug approval

c) To maximize the likelihood that optimal drug dose will be prescribed after approval

d) To reduce the costs of clinical trials

e) To explore all possible disease state indications at time of initial approval

5. Which of the following is true of inhaled delivery of an aerosolized drug suspension?

a)An ideal drug would have low first pass hepatic metabolism to maximize systemic absorption

b)In contrast to milled powders, drugs in suspension are dosed in partial pressures

c)Efficiency of drug delivery by multi-dose inhalers is highly dependent upon patient technique

d)Typical multi-dose inhalers produce a very homogenous particle size of drug

e)Nebulized delivery of drug by face mask is not appropriate for children, demented or obtunded patients

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c)Can be determined using only the half life of a drug

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e)Is usually small in drugs that require a loading dose

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b)Large molecular weight

c)Strong protein binding

d)Good water solubility

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Child Pugh score

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Degree of fibrosis and shunt on ultrasound

Levels of liver function tests

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c)Absorption rate constant

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B)Always follows phase 1 metabolism

c)Employs breaking of aromatic ring structures

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b)Childhood Vaccine Act

c)Rare Disease Act

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b)Clinical endpoint

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d)Competitive advantage

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b)Phase II

c)Phase III

d)Phase IV

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