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3.00 moles of an ideal gas at 27 degrees Celsius expands isothermally from an initial volume of 20.0dm3 to a final volume of 60.0dm3. Compute w for this process (a) for expansion against a constant external pressure of 1.00 x 105 Pa and (b) for a reversible expansion
In a lab exercise 2.43 grams of sodium chloride NaCl is placed in a calorimetric cup containing 50 mL of water at 19 degrees celcius. After mixing the solution temperature is 16.5 degrees celcius.
A 44 sample of water absorbs 329 of heat If the water was initially at 21.7, what is its final temperature.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of Br- is doubled? Just put in the number as a whole number or fraction.
alkaline earth metal hydroxide to be used as a strong base or good source of hydroxide ion in aqueous solution for practical operation, which one would you use? Please explain why.
Sample of ammonia gas is completely decoposed to nitrogen and hydrogen gases over heated iron wool. If the total pressures is 661mmHg after the reaction. Calculate partial pressures of nitrogen and hydrogen.
Calculate the sulfide ion concentration that is required to just start precipitation of CoS from a solution that is 0.10 M in Co2+. For CoS : Ksp = 4 x 10-21
One reaction gives the ether in good yield, and the other undergoes an elimination reaction. Which reaction gives the ether? What is the product of the elimination reaction?
An electrochemical cell has an Eocell of 2.00 V and transfers 1 mole of electrons. The Faraday constant is 96,485 C/mol e-. What is the value of delta G
At what pH does the tripeptide, Ala-Val-Cys, have a net charge of -0.8? A. pH = 4.4 B. pH = 6.0 C. pH = 7.6 D. pH = 8.8 E. pH = 10.8
A human body contains 6 liters of blood. The hemoglobin content of blood is about 15.5g/100 mL of blood. The approximate hemoglobin molecular weight is 64,500g/mol. How many moles of hemoglobin are present in a typical adult?
two naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of rhenium.
Draw the structure of the peptide in its predominant ionic form at a)pH 2; and b) pH 8 and determine its net charge at the specified pH values c) draw a titration curve of PH with respect to a dual axis with the equivalents of HCl added and the ne..
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