Securing the crime scene includes . the locking of all the doors around the house the proper packaging and storing of all evidence the law enforcement officer taking command of the scene and setting boundaries so that uninvolved persons cannot come on the scene, thus keeping both people and evidence safe the emergency medical team's arrival

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.