Which is true of ionic compounds? they have characteristically low melting and low boiling points. they are electrically charged, either positive or negative. they contain no charged particles. they form hard, brittle crystals with characteristic shapes.

What are the similarities of physical and chemical change ?

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

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: