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Carbon- 11 Decays by Positron Emission

Question 72

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Carbon- 11 decays by positron emission:
Carbon- 11 decays by positron emission: The decay occurs with a release of 2.87 × 10<sup>11</sup><sup> </sup>J per mole of carbon- 11. When 4.00 g of carbon- 11 undergoes this radioactive decay, _ _ g of mass is converted to energy. A) 1.28 × 10<sup>-</sup><sup> </sup><sup>2</sup> B) 1.16 × 10<sup>-</sup><sup> </sup><sup>3</sup> C) 3.48 × 10<sup>5</sup> D) 1.16 × 10<sup>- </sup><sup>6</sup> E) 8.62 × 10<sup>2</sup>
The decay occurs with a release of 2.87 × 1011 J per mole of carbon- 11. When 4.00 g of carbon- 11 undergoes this radioactive decay, _ _ g of mass is converted to energy.


A) 1.28 × 10- 2
B) 1.16 × 10- 3
C) 3.48 × 105
D) 1.16 × 10- 6
E) 8.62 × 102

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