Daylight Hours: 9 hours, 11 minutes (-8m 42s). The Sun's altitude in Tromsoe tromsÃ¸. Today the horizontal line signifies the, horizon the vertical lines show the times of sunrise and. Sunset altitude and heading are displayed in the box on the. right
Hydrogen cyanide (HCN), sometimes called prussic acid, is an organic compound with the chemical formula HCN. It is a colorless, extremely poisonous and flammable liquid that boils slightly above room temperature, at 25.6 Â°C (78.1 Â°F).
What is Halon and How Does it Work? Halon is a Clean Agent.. The National Fire Protection Association defines, a Clean Agent as an electrically non-conducting, volatile, or gaseous fire extinguishant that does not leave a residue upon evaporation.. Halon is a liquefied, compressed gas that stops the spread of fire by chemically disrupting combustion.