Which statement best explains why most atomic masses on the periodic table are decimal numbers?
(1) atomic masses are determined relative to an h–1 standard.
(2) atomic masses are determined relative to an o–16 standard.
(3) atomic masses are a weighted average of the naturally occurring isotopes.
(4) atomic masses are an estimated average of the artificially produced isotopes.

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

Apush or pull that moves or changes and object when to objects touch

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