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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
a solution of 14. g of a nonvolatile nondissociating compound in 1.0 kg of benzene boils at 81.7 oc. calculate the
what is the partial pressure of each gas if the total pressure of each gas if the total pressure is 735 mm Hg
Compute the pH of 500mL of a solution that is 0.200 M in C6H5NH2 (aniline) and 0.100 M IN C6H5NH3Cl anilinium chloride. Kb aniline=4.3*10^-10
a) What us the change in momentum? Include magnitude and direction. b) What is the impulse acting on the car?
If your pipet was incorrectly calibrated so that it transferred 5% too much solution, would the density you calculated for the liquid tend to be larger or smaller than the correct value
At a particular temperature, 12.0 moles of SO3 is placed into a 3.0L rigid containerand the SO3 dissociates by the reaction 2SO3 (g) 2SO2 (g) + O2 (g)
The density of titanium metal is 4.51 g/cm}^3 at 25 C}. What mass of titanium displaces 69.6 mL of water at 25 ^C?
how many possible trisubstituted derivatives c6h3x2y can be obtained from the meta disubstituted benzene c6h4x2? (ignore directive effects of the substituents x and assume that all positions on the ring are accessible to the reagent y+).
How many mL of 5M NaCl are required to prepare 1500 mL of 0.002 M NaCl? What would be the concentration of the diluted solution from Problem expressed in mM, ?M, and nM
A substance with a partition coefficient of 2.5 is extracted into an organic phase by successively using 5 equal volumes. If the initial aqueous solution initial aqueous solution was 50 mL, how much organic solvent (total) would be needed to extract..
Describe the preparation of one liter of 0.10 M ammonium cholride buffer, ph=9. starting with solid ammonium cholride pk=9.26 and 1 M NaOH. describe in detail steps to solve and use correct units please
Iron pyrite (fool's gold, Figure 1.11) has a shiny golden metallic appearance. Crystals are often in the form of perfect cubes. A cube 0.40 cm on each side has a mass of 0.064 g.
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