how could you check that when the calcium carbonate is reacting with hydrochloric acid the gas given off is carbon dioxide

One does not belong why? ice, gold ,wood ,diamond and table salt

The arrangement of particles is most ordered in a sample of

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