The nuclear mass of helium is 4.002602. How much energy, in joules, is released when two moles of deuterium nuclei fuse to form one mole of helium? Please show process. Thanks!

Question

anonymous · Answer

Go to http://www.webelements.com/ and look up the exact mass of deuterium (under isotopes of hydrogen). Subtract the mass of He-4 from the mass of two H-2. That is your mass defect. Now use E = mc^2 to convert to an energy difference.

anonymous · Answer

I did that that, but what about the moles?

anonymous · Answer

Multiply by Avogadro's number.