2 moles of hydrogen gas reacts with 1 mole of oxygen gas to form 2 mole of water. This reaction liberates 115.7 kcal

What layer of the atmosphere is directly above the troposphere?

Which element is the least metallic between cadmium, silver, zinc, or iron?

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.