If 0.040 g of O2 dissolves in a liter of water at 1.0 atm pressure, how much would dissolve in a liter of water at 15 atm pressure?

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

i believe it is c.) 1575 j.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: