Which of the following pairs of formulas have the same empirical and molecular formulas?
a. c2h4o2 and ch20
o b. ch2 and ch4
oc. c6h6 and ch4
od. co2 and so2

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