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Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient\'s body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of damage to healthy tissue. Iridium-192 is often used in the head or breast. Answer the following three questions (a, b, and c) based on the radioactive decay curve of iridium-192, shown below. Theres a graph, but i dont know how to use it
a) If the initial sample is 1.75 g, what mass of the original iridium-192 remains after 5 days?
b) Estimate the half-life of the radioisotope.
c) How many days would it take for one-fourth of the sample to decay?
An aqueous copper(II) sulfate solution is electrolyzed for 3 hours with a 1.8 ampere current
At some temperature, a chemist found the following equilibrium concentrations. [Fe3+] = 6.63 10-3 M, [SCN-] = 7.36 10-3 M, [FeSCN2+] = 4.34 10-2 M
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an airplane is pressurized to 650 mmhg. The partial pressure of oxygen is 137 mmhg. If the partial pressure of oxygen drops below 100.mmhg.
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A sample of molten iron occupies a volume of 7.11 x 10-3 L. If the density of iron is 7.86 g/cm3, what is the mass of iron in grams in the sample?
Question about Ideal gas law, Cyclopropane is used as a general anesthetic. If a sample of cyclopropane stored in a 2.00L container at 10.0 atm
The [H3O+] is 1*10-6M in a solution. Calculate the [OH-]
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