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One of the nuclides in spent nuclear fuel is U-235, an alpha emitter with a half-life of 703 million years. How long would it take for the amount of U-235 to reach 1/8 of its initial amount?
The atomic mass of Potassium 39 is 38.96371 AMU. Calculate the binding energy for a mass of this nuclide using 1.008665 AMU for the mass of the neutron, 1.007276 AMU for the mass of the proton, 0.00054858 AMU for the mass of the electron
Calculate the hydronium ion concentration and the pH after the addition of 0.25 mL of 0.10 M HCl to each one.
What is the [t-BuCl], in M, when bromophenol blue changes color. Given this data, what will the kinetic equation (x-kt) be for this data. If 787 sec were required for the bromophenol blue color to change, then calculate
Which of the following molecules would be expected to exhibit hydrogen bonding? a.methane b. hydrogen bromide c. ethanoic acid (acetic acid) d. hydrogen sulfide
You are a laboratory assistant for your chemistry course. There are 250 students in the course, and each needs to use 25 mL of a 0.15 M solution of copper sulfate.
Calculate the mass of butane needed to produce 89.8g of carbon dioxide. express the mass of butane numerically
What mass of helium gas is needed to pressurize a 120.0 L tank to 264 atm at 25°C?
Calculate the minimum weight of anhydrous MgSO4 needed to absorb a hypothetical volume of 0.074 mL of residual water from a wet caffeine/dichloromethane.
Explain clearly the properties of agood freezing agent basing the explanation vant hoffs factor and on colligative property.
Although the mechanism of the acid catalyzed ring opening polymerization of sigma-decalactone is slightly different than the mechanism of Sn(Oct)2 catalyzed lactide polymerization, both reactions are of the same type. Identify the reaction type an..
What mass of sucrose should be combined with 521 of water to make a solution with an osmotic pressure of 8.15 at 285 ? (Assume the density of the solution to be equal to the density of the solvent.)
Calculate the approximate freezing point of a solution prepared by dissolving 10.0 g of naphthalene (C10H8) in 300. g of cyclohexane. Pure cyclohexane freezes at 6.6°C. Kf of cyclohexane = 20.0°C/m.
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