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).
Exothermic Gas. Exothermic gas or exo gas is used for the thermal treatment of metals as a protective gas. It is the cheapest shielding gas available and can be generated in an exothermic gas generator by burning natural gas, consisting mainly of methane or other hydrocarbons with some lack of oxygen.