Fe2O3 is the limiting reagent in this reaction. Fe2O3 2 Al --> Al2O3 2 Fe 29.1g Fe was produced and the yield of the reaction was 85.9% Find the original mass of Fe2O3 that must have been used?

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.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

Isopropyl alcohol, (ch3)2choh, is a common solvent. determine the percent by mass of hydrogen in isopropyl alcohol. a) 6.71% h b) 13.4% h c) 25.0% h d) 53.3% h