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The half-life of thallium-201 is 72.9 hours. How many milligrams of a 77.9 milligram sample of thallium-201 will be lost by radioactive decay during 365 hours?
We are asked to write the balanced equation when glucose is reacted with ammonium chloride + epichlorohydrin + isopropyl alcohol. What is the ultimate end product? Hopefully it is supposed to be some form of a quaternary ammonium radical attached to ..
Calculate the mean free path and the binary number of collisions per liter per second between HI molecules at 300 K and 1.00 atm. The collision diameter of the HI molecules may be taken to be 5.10 A. Assume ideal-gas behavior.
The solubility product constant of calcium sulfate,CaSO2 is 7.10*10^-5 . How many grams of calcium sulfate can dissolve in 53.5 of pure water
a sample of 1.5 grams of unknown alkali metal carbonate that was dissolved in h2o and 31.10ml of 0.350m cacl2 was
The pKa of phosphoric acid is 7.21. What is the useful buffering range of this acid and its conjugate base? Briefly, explain.
The substance acetylsalicylic acid (aspirin) (HC9H7O4) is a weak acid (Ka = 3.0×10-4).
A sample of gas has an initial volume of 3.9L at a pressure of 715mm Hg . If the volume of the gas is increased to 5.5L , what will the pressure be? (Assume constant temperature.) Express your answer using two significant figures.
A piston has an external pressure of 8.00 torr How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.450 liters.
Calculate the pH of the solution that results when 40.0 mL of 0.100 M NH3 is mixed with 20.0 mL of 0.250 M HCl solution.
ATP is created from ADP and Pi in the mitochondria of most cells. this reaction is thermodynamically endergonic. what directly provides the energy for this reaction to occur
If A length of #8 copper wire radius =1.63 mm has a mass of 24.0 kg as well as a resistance of 2.061 ohm per hm. Explain what is the overall resistance of the wire
The Haber-Bosch process is a very important industrial process. In the Haber-Bosch process, hydrogen gas reacts with nitrogen gas to produce ammonia according to the equation 3H2+N2=2NH3
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