9) A pure sample of an element was vaporized and injected into a mass spectrometer and the data was plotted on the graph belovr. The mass values for the isotopes were
found to be: A-56 (55.935 amu), A-54 (53.940 amu), A-57 (56.935 amu), and A-58
(57.933 amu). Find the average atomic mass and identify the element.

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?

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.