Students conduct an experiment in which steel wool is burned in a closed test tube. the steel wool reacts with an amount of oxygen equal to 1.43% of the mass of the steel wool. what is the correct value for the missing mass in the table?

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