How many moles are in 7.2 x 10^23 carbon molecules?

What is important to study for nios grade 12 chemistry? i have only one month left.

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?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball