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Plutonium-240 (PU-240) is a byproduct of the nuclear reaction that takes place in a reactor. It takes one thousand years for 10% of a 4.60 g sample to decay. (Nuclear decays are first-order reactions)
(a) What is the half-life of PU-240?(b) How long will it take to reduce a 2.00 g sample to 15% of its original amount?(c) What is the rate of decay of a 5.00 g sample in g/year?
Krypton crystallizes as a fcc (face centered cubic unit cell) having an edge length of 559 pm. What is the density of solid Krypton?
Why is mercury being replaced by other liquids such as colored alcohol as the temperature-sensing fluid
Choose a more convenient order. (b) Calculate q, w, deltaU, deltaH, and deltaS when the gas changes between the same two conditions
Calculate the change in pH when 3.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
What is the value of x in the formula for the hydrate? (hint: remember that x represents the ratio of moles of H2O to moles of hydrate compound, and that moles of hydrate compound equals the moles of anhydrous compound)
calculate the heat released when 166g of water at 23 degrees celcius is converted to ice at negative 10 degrees celcius
The solution to Chemistry, Are there differences between having electron-donating groups and electron-withdrawing groups
For IF5 draw an appropriate Lewis structure.
A stream of propane is throttled from 20 bar and 518 K to 0.42 bar. This process is irreversible due to frictional losses at the nozzle.
at 25 degrees Celsius, the vapor pressure of water is 23.8 torr. What is the vapor pressure of a solution prepared by dissolving 65 grams of glucose in 150 grams of water?
A cetain weak acid, HA, has a Ka value of 1.4E-7 A) Calculate the percent ionization of HA in a 0.10 M solution. B) Calculate the percent ionization of HA in a 0.010 M solution
A sample containing 0.35 mol argon gas at a temperature of 13 C and a pressure of 568 torr is heated to 56 C and a pressure of 897 torr. A. What is the original volume of the gas? B. What is the new volume of the argon gas?
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