Rdium-226 atomic mass 226025402 decays to radon-224 a
Radium-226 (atomic mass = 226.025402 ) decays to radon-224 (a radioactive gas) with a half-life of 1600 years. what colume of radon gas is produced by 25.0 g of radium in 5.0 days?
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Calcium in blood or urine can be determined by precipitation as calcium oxalate CaC2O4. The precipitate is dissolved in strong acid and titrated with potassium permanganate. The products of the reaction are carbon dioxide and Manganese ii ions.
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Provide the estimated lead time to process a policy through the entire system. Also provide the actual processing time for a policy. Explain the reason for the difference.
Sodium oxalate, Na2C2O4, in solution is oxidized to CO2 by MnO4- which is reduced to Mn2+. A 50.1 volume of a solution of MnO4- is required to titrate a 0.339 g sample of sodium oxalate.
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What is the hydronium-ion concentration of a 0.40 M solution of HCN (Ka= 4.9×10-10) at 25° C?
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