How would each of the following experimental errors affect your results (yield, purity, and/or melting point)? a. you used twice the amount of methanol needed to recrystallize naphthalene. b. you didn't completely dry your naphthalene. you placed your hot naphthalene solution from the hot water bath directly into the ice/water bath.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

In 2002, the rare earth elements mine in mountain pass, california was closed because

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.