A 0.234 g sample of an ore is analyzed for Iron and found to contain 0.720 mg Fe203. How many Fe*3 parts per million (ppm) exist in this ore. (Round your decimals to closest integer)

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.