Carbon dioxide turns limewater milky. Limewater is an alkaline solution of calcium hydroxide. It reacts with carbon dioxide to form calcium carbonate, which is the reason limewater becomes milky.Know More
Carbon dioxide, an odorless, non-flammable and colorless gas, is not reactive chemically. However, if the concentration of carbon dioxide is high, it can be an asphyxiant and a toxic gas that can cause irritation of the nose, throat and eyes.
When calcium carbonate or limestone is heated at temperatures of around 1,100 to 1,200 degrees Celsius, limestone can be quickly converted into carbon dioxide and lime or calcium oxide. When lime dissolves in water, it becomes slaked lime. Both slaked lime and lime are used for lessening sulfur emissions in gas-fired and coal power stations.Learn more about Atoms & Molecules
Helium is a noble gas and has the chemical symbol He. Helium is commonly known for its property of being lighter than air.Full Answer >
Pure hydrogen gas, H2, is almost purely water insoluble, and like all other gases, its solubility decreases as the temperature of the water increases. At zero degrees Celsius, the solubility of hydrogen is 0.0019 grams per kilogram of water, which drops to below 0.0012 g/kg at 60 degrees.Full Answer >
The molar volume of hydrogen gas at standard temperature and pressure is 22.4 liters. Standard temperature and pressure means a temperature of 0 degrees Celsius and a pressure of 1 atmosphere.Full Answer >
The chemical formula for hydrogen gas is H2. Its molar mass is 2.016 grams per mole, and it exists as a gas at standard temperature and pressure, where its density is 0.09 grams per liter. Hydrogen's melting point is -434.49 degrees Fahrenheit and its boiling point is -423.182 degrees Fahrenheit.Full Answer >