I need help with this whole lab.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins