A Certain Isotope Has a Specific Activity of 7

question 61

Multiple Choice

A certain isotope has a specific activity of 7.29 × 10^-4 Ci/g. How many  particles will a 75.0 mg sample emit in one hour?

• A) 9.99 × 10⁴
• B) 2.02 × 10⁶
• C) 7.28 × 10⁹
• D) 1.29 × 10¹²
• E) none of the above

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