238U -> 234Th+4He The radioactive decay of Uranium-238 releases alphas particles and results in a mass change of 0.135 g. Determine the amount of energy released by this reaction.

1.22 x 1013 j

1.22 x 1016 j

4.05 x 10

4.05 x 101

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2