Simple definition of chemical change

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

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?

What is the number of moles in 15.0 g ash3?