Which pair of compounds has the same empirical formula? ch and c2h2 c2h6 and ch c3h8 and c3h c2h2 and c2h

What is the percentage composition of carbon in the compound ch4

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat

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.