Calculate the amount of energy in joules that would be produced if 2.50 x 10^-3 kilogram of matter was entirely converted to energy.

To solve the problem, we can use the Einstein's famous equivalence between energy and mass:

where 
E is the energy
m is the mass
c is the speed of light

In this problem, the mass of the substance is , so if all this mass would be converted in energy, we would have an energy of