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Naturallyoccurring cobalt consists of only one isotope, 59Co,whose relative atomic mass is 58.9332. A synthetic radioactiveisotope of cobalt, 60Co,relative atomic mass 59.9338, is used in radiation therapy forcancer. A 1.8405gsample of cobalt has an apparent "atomic mass" of58.9901.Findthe mass of 60Coin this sample.
What is the pH of a solution prepared by diluting 25.00 mL of0.020 M Ba(OH)2 with enough water to produce a totalvolume of 250.00 mL?
|Determine the acid dissociation constantfor a 0.10 M acetic acid solution that has a pH of 2.87. Aceticacid is a weak monoprotic acid and the equilibrium equation ofinterest is |
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