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).
Shale gas refers to natural gas that is trapped within shale formations. Shales are fine-grained sedimentary rocks that can be rich sources of petroleum and natural gas. Over the past decade, the combination of horizontal drilling and hydraulic fracturing has allowed access to large volumes of shale gas that were previously uneconomical to produce.