The chemical equation: 2Na3(PO4) + 3Ca(OH)2 ---> 6NaOH + Ca3(PO4)2 If you have 3 moles of Na3(PO4), how many grams of NaOH do you produce?

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In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added