Use the Table of Enthalpies of Formations, to determine the heat of reaction (ΔHrxn) for the combustion of benzene [C6H6] 2 C6H6(l) + 15 O2(g) à 12 CO2(g) + 6 H2O(l) ΔH°rxn = ?

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?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

The biosphere of the earth is made up of what compound? organic or inorganic?