Which constants would most likely be filled in the first row of 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

Hno2 + caco3 = h2co3 + ca(no2) can someone balance this

How many moles of potassium nitrate, kno3 are present in a sample with a mass of 85.2 g?