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A tank utilized for storing liquefied natural gas (LNG) must be taken out of service as well as inspected. All the LNG that can be pumped out of the tank is removed. The tank then warms from its service temperature (~-200°F) to ambient temperature and 1 atm vaporizing all the gas, which can be assumed to be pure methane. Purging is accomplished in two steps. First liquid nitrogen is sprayed onto the tank floor. The nitrogen vaporizes as well as the cold nitrogen gas displaces the warm methane vapor in a piston-like flow until the nitrogen fills the tank. Once the methane has been displaced the nitrogen warms to ambient temperature. Air is then blown into the tank from a blower capable of 10,000 ft3 /min. The air mixes with the nitrogen rapidly as well as completely, so the concentration of air leaving the tank is the same as that in the tank. (The tank is well mixed.) Explain how many gallons of liquid nitrogen are required if the volume of the tank is 175,000 barrels? Explain how many cubic feet of air are required to increase the concentration of oxygen in the tank to 20% by volume? Explain how long must the air be blown into the tank to achieve this concentration?
What type of compound is produced by the reduction of aldehydes and ketones?
Determine how many grams of aluminum hydroxide will get from 18.2g of aluminum sulfide and determine the density of this newly minted penny
what is the lewis dot structure for if6 iodine
What common mono-positive ions will coprecipitate with barium sulfate in the determination of soluble sulfate
The compound para-dichlorobenzene often used in mothballs, is composed of 49.02 % carbon, 2.743 % hydrogen, and 48.24 % chlorine by weight.
If the syringe volume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R
Explain the detoxification of Acetaminophen, alcohol, and sodium nitrite with biotransformation of xenobiotics. Describe the Synthesis of fatty acid, Triglyceride, Vitamin E, and Vitamin C.
Calculate pCu at the equivalence point in the titration of 20.0 mL of 0.0161 M CuSO4 with 0.0100 M EDTA at pH 8.00.
Consider the exothermic reaction A(g) + B(g) C(g) + D(g). Would you expect the addition of heat to lead to the formation or consumption of A(g)? Why?
Describe the difference between the following and list any particular advantage possessed by one over the other a)filters and monochromators as wavelength selectors
Calculate the partial pressure of each, the total pressure and the composition of the liquid solution.
The "lead" in lead pencils is actually almost pure carbon, and the mass of a period mark made by a lead pencil is about 0.0001g How many carbon atom's are in the period?
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