If you have 1.82 x 1024 atoms of Oxygen in Oxygen Gas (O2), how many grams do you
have?

What metric units would you use to measure the thickness of a key

Light waves travel than sound waves.

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