"Air pollution ~ A chemical plant is required to maintain sulfur dioxide levels in the working environment atmosphere at an average level of no more than 0.15 parts per million (ppm). Safety engineers measure the levels at a randomly chosen 15 intervals each week. If the sample mean sulfur dioxide level is more than 0.168 ppm, the safety protocols say that the plant will be evacuated while the air is scrubbed and machines are adjusted"

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation: