K+ is an electrolyte required by the human body and found in many foods as well as salt
Chapter 0, Problem C1.11(choose chapter or problem)
K+ is an electrolyte required by the human body and found in many foods as well as salt substitutes. One of the isotopes of potassium is potassium-40, which has a natural abundance of 0.012% and a half-life of 1.30 * 109 yr. The isotope potassium-40 decays to calcium-40 or to argon-40. A typical activity for potassium-40 is 7.0 mCi per gram. 15.2, 5.3, 5.42 a. Write a balanced nuclear equation for each type of decay and identify the particle emitted. b. A shaker of salt substitute contains 1.6 oz of K. What is the activity, in milliCuries and becquerels, of the potassium in the shaker?
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