When the acetone evaporates, what is the change in enthalpy
(AH) for this process?

a) negative (-)
b) positive (+)
c) zero (0)
d) unknown, it's temp dependent (?)​

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

How is the atomic number of a nucleus changed by alpha decay