consider the reaction that occurs when ammonia gas reacts with oxygen to form nitrogen dioxide and water. how many molecules of oxygen gas must be consumed during the reaction when 100 molecules of ammonia react? enter your answer as a number. do not include the words "molecules".

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.