Overview Oxygen is the third most abundant element in the universe by mass, after hydrogen and helium, and the most abundant element by mass in the Earth's crust. Dioxygen as a gas makes up 20.9% of the volume of Earth's atmosphere, and is also present in the form of water vapor and...
When required in tonnage quantities, oxygen is prepared by the fractionaldistillationof liquid air. Of the main components of air, oxygen has the highest boiling point and therefore is lessvolatilethannitrogenandargon. The process takes advantage of the fact that when a compressed gas is allowed ...
Atomic mass15.999 amu[1] Molar mass15.99940 ± 0.00030 g/mol[5] Molecular weight31.998 g/mol[6] Mass number16[7] AllotropesO2, O3[1] Physical Properties ColorGas: colorless,Liquid: pale blue[1, 8] Melting point/freezing point-218.79 °C, -361.82 °F[1] ...
Traditionally, zeolites aluminosilicates) are defined as crystalline materials in which Si and Al are tetrahedrally coordinated by oxygen atoms in a three-dimensional network creating uniform sized pores of molecular dimensions. From: Renewable and Sustainable Energy Reviews, 2013 ...
Oxygen is a gas and a non-metal. Non-metals are found in two states at room temperature - solids such as selenium and phosphorus and gases (e.g. nitrogen and oxygen). The element has 2 allotropes - ozone and diatomic form. Ozone has 3 atoms while the diatomic form has 2 unpaired el...
Lavoisier was the first person to declare that the new gas was an element. He was also the first person to explain how oxygen is involved in burning. In addition, he suggested a name for the gas. That name, oxygen, comes from Greek words that mean "acidic" (oxy-) and "forming" (-...
'Oxygen affinity' refers to the ability of hemoglobin to bind oxygen at a specific partial pressure of oxygen, influenced by factors like temperature, pH, and organic phosphate concentration. It is measured by P50, the partial pressure of oxygen needed for 50% saturation of hemoglobin. ...
Oxygen has many uses both in nature and commercially. Oxygen, as ozone, in the stratosphere creates a layer that protects organisms from the sun's harmful radiation. It is also the second most abundant gas in our atmosphere and helps organisms break down glucose into usable energy for their ...
Oxygen is the third most abundant element in the universe by mass after hydrogen and helium and the most abundant element by mass in the Earth's crust. Diatomic oxygen gas constitutes 20.9% of the volume of air. All major classes of structural molecules in living organisms, such as proteins...
Appearance:Colorless, odorless, tasteless gas; pale blue liquid Atomic Volume(cc/mol):14.0 Covalent Radius(pm):73 Ionic Radius:132 (-2e) Specific Heat(@20°C J/g mol):0.916 (O-O) Pauling Negativity Number:3.44 First Ionizing Energy (kJ/mol):1313.1 ...