How many moles of Al are needed to react exactly with 10.0 moles of Fe2O3 according to the following equation?
Fe2O3 + 2 Al --> Al2O3 + 2Fe

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

Which is the most concentratic acid

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved