Excuse me what is
20x + 25y = 1115

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

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

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