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Part 1)
Cobalt-60 was used in radiation therapy. It creates ionizing radiation which damages DNA of cancer cells. Given that its half life is 1925.20 days, how long does it take for 25% of a sample to decay? Answer in number of days
Part 2)
Hydrazine is somewhat toxic. Use the half reactions shown below to explain why household bleach(a highly alkaline solution of sodium hypochlorite) should not be mixed with household ammonia or glass cleansers that contain ammonia.
ClO- + H20 + 2e- --> 2OH- + Cl- E^o = 0.90V
N2H4 + 2H20 + 2e- --> 2NH3 + 2OH- E^o = -0.10V
Give the chemical equation for the reaction that occurs in (B) to reach equilibrium.
Mixture also contains He (helium gas). determine the partial pressure of the He gas?
Among the elementary subatomic particles of physics is the muon, which decays within a few nanoseconds after formation. The muon has a rest mass 206.8 times that of an electron. Calculate the de Broglie wavelength associated with a muon traveling..
determine what concentration of oh - is needed to dissolve 0.015 mol ofnbspznoh2 zinc hydroxide in a liter of solution
For the following scenarios, use the WPH framework. First, explain the ethical dilemma and identify the primary stakeholder(s) (the who).
Perform each of the following conversions,being sure to set up clearly the appropriate conversion factor in each case- i) 2.4 lb to kilograms
Experiment - Grignard Synthesis of Triphenylmethanol from benzophenone. What is the purpose of ether extraction. What did you make in the procedure 13
question when a mix of 10 ml of 2 m na2co3 solution with 8 ml of 1 m hcl solution co2 is producedna2co3 aq 2 hcl aq
Suppose 68 g of carbon monoxide is reacted with 8g of hydrogen gas to produce methanol (chemical formula CH3OH or CH4O) a) Calculate the theoretical yield of methanol. B) If 3.57 x 10^4 of methanol is recovered, what is the percent yield of meth..
After the sodium hydroxide cools, it has a mass of 4.84 g. As per to the law of conservation of mass, define what mass of carbon dioxide must have been formed
What is the vapor pressure of a solution which contains 0.550 moles of acetonitrile and 0.350 moles of acetone? Assume the mixture behaves as an ideal solution.
A sample of h20 with a mass of 46.0 grams has a temperature of -58 degrees celcius. how many joules of energy are necessary to heat the steam from 100 degrees celsius to 114 degrees celcius.
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