PLEASE HELP ME!! The topographic Map shows the location of a park ranger at point X when the message is received that an injured hiker needs help at point Z

Which of these is the closest to the difference in elevation between the locations of the ranger and the injured hiker

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

Gasoline has a density of 0.740 g/ml. if you have 328 grams of gasoline, what is the volume in milliliters?

Hey, could someone me answer this? much appreciated!