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A spring loaded piston cylinder device is initially filled with 0.2 lbm of an R-134a liquid vapor mixture whose temperature is -30 deg F and whose quality is 80 percent. The spring constant in the spring force relation F=kx is 37 lbf/in and the piston diameter is 12 in. The R-134a undergoes a process what increases its colume by 40 percent.
Calculate the final temperature and the enthalpy of the R-134a.
The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere
Calculate the mass of nitrogen dissolved at room temperature in an 83.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
Calculate the frequency (in Hz) of light necessary to move an electron in a He+ ion from the n =2 to n =4 energy level. The Rydberg constant for a helium ion is R = 4.390 x 107 m-1
when a 45 g sample of an alloy at 100 c is dropped into 100 g of water a 25c the final temperture is 37 c. what is the
You take 306.5 g of a solid at 30.0 C and let it melt in 400. g of water. The water temperature decreases from 85.1 C to 30.0 C. Calculate the heat of fusion of this solid.
Consider the following qualitative analysis scenario and then classify what type(s) of qualitative analysis principle is/are being used. More than one choice may be correct.
How can one confirm the identity of a peak in a chromatogram. How does one choose a solvent in HPLC
Calculate the pH of a 3.92×10^-3 M solution of H2SO4. (Ka = 0.0120 for HSO4-) 3-In a 4.66×10^-2 M solution, a monoprotic acid, is 20.4% dissociated. Calculate Ka for this acid
a 265- flask contains pure helium at a pressure of 757 . a second flask with a volume of 485 contains pure argon at a
present brief descriptions of three methods that can be utilized to decrease noise from post data acquisition by an
Calculate the concentration of each of the following solutions in mass percent. Part A - 9.15g C2H6O in 71.1g H2O, Part B - 104g KCl in 608g H2O, Part C - 36.3mg KNO3 in 2.44g H2O
What are some methods done by latent fingerprints. What are some advantages and disadvantages to latent fingerprints?
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