Carbon burns in the presence of oxygen to give carbon dioxide. which chemical equation describes this reaction?
© a.
carbon + oxygen + carbon dioxide
ob. carbon + oxygen - carbon dioxide
c.
carbon dioxide - carbon + oxygen
o d.
carbon dioxide + carbon - oxygen

Which substance has non polar covalent bonds

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

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