A master's degree can boost your earning power, with the National Association of Colleges and Employers reporting that the average starting salary for a master's degree in computer science is $80,400.
Ammonia is a colourless gas with a characteristic pungent smell. It is lighter than air, its density being 0.589 times that of air. It is easily liquefied due to the strong hydrogen bonding between molecules; the liquid boils at â33.3 Â°C (â27.94 Â°F), and freezes at â77.7 Â°C (â107.86 Â°F) to white crystals.
Ammonia is the only common alkaline gas. Its density is about half that of air and it has a characteristic smell. Its maximum safe level is 25ppm but its alkalinity makes it highly reactive with acid gases and chlorine and its presence in atmospheres containing other gases is often masked by this.