A Pure Sample of ²²⁶Ra Contains 2

question 32

Multiple Choice

A pure sample of ²²⁶Ra contains 2.1 × 10¹⁵ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the decay rate of this sample? (1 Ci = 3.7 × 10¹⁰ decays/s)

• A) 1.1E-6 Ci
• B) 2.9E+4 Ci
• C) 7.8E-7 Ci
• D) 2.5E+1 Ci
• E) ​3.5E+1 Ci

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Schedule of Cash Payments

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