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If the nuclear binding energy of an atom of Be-9 is 9.6979 x 10-12 J/atom, calculate...

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Chemistry

If the nuclear binding energy of an atom of Be-9 is 9.6979 x10-12 J/atom, calculate the atomic mass of thenuclide.

Answer & Explanation Solved by verified expert
4.3 Ratings (935 Votes)

Given nuclear binding energy of Be atom is E= 9.6979 x 10-12 J

We know that binding energy , E = mc2

Where m = mass of Be

           c = speed of light = 3.0x108 m/s

Plug the values we get m = E / c2

                                       = (9.6979 x 10-12 J) / (3.0x108 m/s)2

                                       = 1.078x10-28 kg

                                       = (1.078x10-28 kg)/( 1.66x10-27 kg/mu)            Since 1 amu = 1.66x10-27 kg

                                       = 0.0649 amu
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