Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. what should be the molarity of such a sample of the acid if the density of the solution is 1.504 g/ml?

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: