Differentiate between melting point and boiling point

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

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:

What are the coefficients to balance the following equation? ba+br=babr2