State exactly one-half of the magnesium ions

Reference no: EM13179452

A 228-mL sample of an aqueous solution contains 2.35% MgCl_2 by mass. Exactly one-half of the magnesium ions are Mg-28, a beta emitter with a half-life of 21 hours. What is the decay rate of Mg-28 in the solution after 5.50 days? (Assume a density of 1.02 g/mL for the solution)

Reference no: EM13179452

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