A student wants to prepare 400 mL of buffer with a pH of 4.90 using acetic acid and sodium acetate. a) What should be the acid-salt molar ratio for the buffer? b) If he prepares the solution at a HOAc concentration of 0.12M, how many grams of NaOAc must he add to obtain the desired pH?

Smog is the term used to describe the combination of fog and smoke

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

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?