Iwill give hanson is designing an experiment to test the porosity of a soil sample. his experiment involves the following: place the soil sample in a water-tight container. slowly pour water into the container. measure the volume of water that the soil absorbs. which of the following would improve hanson's experiment? a. if he measured the volume of the soil beforehand** b. if he measured the mass of the water beforehand c. if he measured the porosity of the water beforehand d. if he measured the mass of the soil beforehand

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.