Which statement represents the way a scientist may make a
scientific inquiry?
a. a scientist makes a prediction, makes an observation, and then
asks a scientific question.
b. a scientist makes an observation, makes a prediction, and then
asks a scientific question.
a scientist asks a scientific question, makes a prediction, and
then makes observations.
a scientist makes an observation, asks a scientific question,
and then makes a prediction.

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.