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calculate the activation energy for diffusion for a system where the diffusion coefficient doubles its value from 700k to 1200k. R=8.314J/molk.
Dalton law of partial pressure - The partial pressure of oxygen is maintained at 0.20 atm at this depth
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry (and species) that occurs at each level.
At a certain temperature the rate of effusion of helium is twice the rate of effusion of a gaseous X.X is a binary combination of carbon and hydrgen.
Estimate the value of the equilibrium constant at 685 K for each of the following reactions. Delta H and S for BrCl(g) is 14.6 kJ/mol and 240.0 J/ mol * K, respectively. 2 NO_2(g) > N_2O_4(g.
What is the value for the rate constant, k? What is the concentration of urea in this solution after 4700 seconds if the starting concentration is 0.495 M?
when 9.00 g of Al react with an excess of H3PO4, 30.0 g of AlPO4 are prodecued. What is the percentage yield of this reaction?
The density of lead is 11.3 g/mL. The water level in a graduated cylinder initially at 216 mL rises to 292 mL after a piece of lead is submerged. What is the mass in grams of the lead?
Using a sample of gas has a mass of 38.7mg. Calculate the molar mass if its volume is 228mL at a temperature of 57°C and a pressure of 832torr?
System conducts 1.30x10^2 cal heat to srroundings while delivering 316 cal work. What is the change in internal energy of the system (in Cal).
An aqueous solution is 36.0 % by mass potassium bromide, KBr, and has a density of 1.33 g/mL. determine the mole fraction of potassium bromide in the solution?
A mixture of twenty five grams of potassium nitrate(KNO3) and two grams of CuSO4*5H20 with 11.5 grams of water at 100 degree celcius temperature, 15 g ramsof water are mixed.
A gaseous mixture of O2 and Kr has a density of 1.114 g/L at 431 torr and 325 K.What is the mole percent O2 in the mixture.
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