anonymous
  • anonymous
What is the mass defect (in amu) of a 60/27 Co nucleus whose nuclear mass is 59.9338 amu? What is the mass defect in kilograms? What is the energy equivalent of this mass in kilojoules?
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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JFraser
  • JFraser
If it's an atom of Co-60, then there are 27 protons and 33 neutrons. Find the expected mass of each of those pieces\[27 p^{+1} * 1.007825 amu\] + \[33n^{0} * 1.008665 amu\] should be \[60.49722amu\] since the actual mass is 59.9338amu, what's the defect?
anonymous
  • anonymous
60/27 Co
JFraser
  • JFraser
the defect is the difference between the mass of the nucleons (the protons and neutrons) and the mass of the atom as a whole. The mass of particles should be 60.49722amu, but the actual mass is only 59.9338amu. What's the mass defect?

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anonymous
  • anonymous
is it 7
JFraser
  • JFraser
what is the difference between 60.49722amu and 59.9338amu?
anonymous
  • anonymous
about 1
JFraser
  • JFraser
0.56342amu, which is the mass defect
anonymous
  • anonymous
so What is the energy equivalent of this mass in kilojoules?
JFraser
  • JFraser
turn that mass in amu into kilograms, then use mc^2, where c is the speed of light, to find the energy change in joules
anonymous
  • anonymous
so its 1.12684k

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