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A 10.0- L flask containing He, 2.00 mole of Ar and 3.00 mole of Ne has a total pressure of 24.5 atm at 25 degrees C. How many moles of He are in the flask?
A .500M solution of a weak acid, HX, is only partially ionized. The [H+] was found to be 3.69x10^-3M. Find the dissociation constant for this acid.
175g of water at 86.0 degrees C were added to a perfect calorimeter conataining 103 grams of water at 18.5 C. What is the final temperature of this water mixture?
Describe in detail(ex:individual resins used, etc) the purification of a protein from bovine live that has the following characteristics: Molecular weight of 86,500, pI= 8 and precipitates out of solution at 30% ammonium sulfate
What is the chemical formula of a homonuclear diatomic gas if it has a pressure of 1.40 atm and a density of 1.82 g/L at 27 ºC?
2-bromooctane in 10 mL ether solution gave an observed rotation of -1.8° in a 10 cm cell at 20°C. Calculate the specific rotation of this solution.
A chemical reaction is run in which 463 Joules of work is done by the system and the internal energy changes by -1027 Joules. Calculate the amount of heat transferred.
Explain why platinum's potential decreased with time and explain why the steady-state value was -0.413V vs SHE.
To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 12.9 g, and its initial temperature is -13.9 °C. The water resulting from the melted ice reaches the temperature of your skin,
Determine the structures of the compounds that would give the products
A 0.30 M solution of sucrose (C12H22O11) at 37oC has approximately the same osmotic pressure as blood. What is the osmotic pressure of blood?
No inflection points were observed with the HCl titrations but two were observed in the titration with NaOH. One occurred after 3.29 mL of titrant had been added and another after a total of 18.61 mL of NaOH had been added. Calculate the concentr..
What is the total energy of the photons detected in a period of one hour If a radiation detector is capturing 8 X 10^7 photons per second at this wavelength,?
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