Elaborate law chemistry helps us in production of urea

Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus

What is the theoretical yield of carbon dioxide? a)0.993 gb)2.98 gc)3.65 gd)8.93 g

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