Rate of matter converted to energy

[PhysicsMike]

A nuclear reactor produces 2GW of power, at what rate (grams/sec) is matter converted to energy?


Im feeling stumped by this question, I have a feeling it has to do with E-mc^2, but i just don't know where to start, any feedback would be much appreciated, thanks!

 

[Delphi51]

Welcome to PF!
Yes, use Einstein's formula for energy. You are asked for power, so you will need a formula relating power and energy as well. The definition of power may also be helpful.