A 1.0 g sample of Radium 226 is measured to have a decay rate of 3.7 × 1010 disintegrations/s. What is the half-life of 226 Ra in years? Note: A chemical constant, called Avogadro’s number, says that there are 6.02 × 1023 atoms per mole, a common unit of measurement in chemistry. Furthermore, the atomic mass of 226 Ra is 226 g/mol.
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