Is the radioisotope commonly used to map a human's circulatory system. a. technetium-99m b. carbon-14 c. iron-59 d. cobalt-60

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

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

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".