How are cyanobacteria related to the atmosphere?
A. It is believed they were the first
oxygen-producing organisms.
B. They live in the upper troposphere
of the atmosphere.
C. They are believed to produce
carbon dioxide into the
atmosphere.
D. They fed off the abundant
nitrogen in the atmosphere

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.