A(n) is a hydrocarbon in which one or more hydrogen atoms is replaced by a -cooh and a -nh2 group.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

This drawing shows a human body system. what is the primary function of this body system?