Which of the following methods can be used to separate salt and iron? distillation evaporation filtration magnetism

How many moles are equivalent to 55.5g of nano3

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

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?