What is the limiting reactant in the following equation? How much Fe2O3 will be produced if 2.1 g of Fe with 2.1 g of O2? 4 Fe + 3O2 —> 2Fe2O3

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

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.

Which factor is likely to impact the possible number of compounds ?