Which of these elements is essential to making all organic molecules ?

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?

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.