Calculate the energy released when isotope of carbon, 146c, decays by β - emission. the atomic mass of 146c is 14.003242 u, the atomic mass of 147n is 14.003074 u. assume that the neutrino has no mass.

Question

Chemistry

Hannah Lin

15 September, 06:13

Calculate the energy released when isotope of carbon, 146c, decays by β - emission. the atomic mass of 146c is 14.003242 u, the atomic mass of 147n is 14.003074 u. assume that the neutrino has no mass.

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Answers (1)

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Deven Tyler · Answer 1

The correct answer is: 156.49 keV (0.15649MeV)

Explanation:

Since

E = mc^2

Where E = Energy = ?

m = mass = (14.003242 - 14.003074) amu = 1.68*10^-4amu

Also 1amu * c^2 = 931.5 MeV

Plug in the values in the equation:

E = (1.68*10^-4) * (931.5 MeV) = 0.15649 MeV = 156.49 keV