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Compute the effective radiation dosage (in Sieverts) for a 67kg person who is exposed to 6.9*10^9 particles of alpa radition. Presume that 77% of the radiation is absorbed, each alpha particle has an energy of 6.6*10^-13 J, and that the RBE of the alpha particles is 15. Note that RBE is sometimes call the quality factor, abbreviated as Q.
How is concentration an intensive property? I mean if you add more amount of a substance(mass), the number of moles increase and so the concentration increases.
Which protein elutes first from a diethylaminoethyl cellulose ion exchange column with a decreasing pH gradient
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.89? Kb for ammonia is 1.8*10^-5. mass of NH4Cl
gas expand isothermally and reversibly from 10 bar to 1 bar at t= 25 celcius. calculate q,w, delta u,h,s,a,g. please show how u got the equations
Show the reaction mechanism when 2-methyl-2-butanol, sulfuric acid(H2SO4), and water are in a mixture
Explain why the addition of a small amount of base to an acidic buffer solution causes only a small change in the pH of the buffer solution.
Oxidation-Reduction Reaction Use the half-reaction method to balance the following oxidation-reduction reaction under basic conditions. Physical states are not required. Write each balanced half-reaction and the final balanced net ionic equation.
A gas mixture contains 76% nitrogen and 24% oxygen. If the total pressure is 1.16 atm what are the partial pressures of each component
a sample of H2O with a mass of 46.0 grams has a temperture of 100 c. how many joules energy are necessary to boil the water
The mass of the ice cube is 14.6 g, and its initial temperature is -13.1 °C. The water resulting from the melted ice reaches the temperature of your skin, 30.7 °C. How much heat is absorbed by the ice cube and resulting water
in the first 12.0 s of the reaction 1.8times10-2 moles of o2 is produced in a reaction vessel with a volume of 0.260 l.
How much silver iodide, AgI, in grams will dissolve in 1200 ml of pure H2O at 25 degrees Celcius when the system reaches equilibrium
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