3. lodine-131 is used to destroy thyroid tissue in the treatment of an overactive thyroid. the
half-life of lodine-131 is 8 days. if a hospital receives a shipment of 200g of iodine-131, how
much 1 - 131 would remain after 32 days?
radioisotope:
half life
starting mass =
final amount =
starting time =
end time =

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Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization.a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution.part bcalculate the percent ionization of ha in a 0.010 m solution