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By accessing this web page or using these results in any manner whatsoever, you agree to be bound by the foregoing restrictions.https://chemistry.stackexchange.com/questions/65979/what-is-the-difference-between-o-o2So, to reiterate, the difference between oxygen $\left (\ce O\right)$ and oxygen $\left (\ce {O2}\right)$ is that the former is an oxygen atom while the latter consists of two $\ce O$ atoms bound together, forming a molecule also called oxygen.Thu, 02 Apr 2026 14:28:00 GMThttps://chemistry.stackexchange.com/questions/104791/why-do-we-call-o2-oxygenLikewise $\ce {O2}$ is as much oxygen as atomic oxygen is. The only complication is that what we habitually think of as oxygen is oxygen as a gas comprised of $\ce {O2}$ molecules. Like Humpty Dumpty in Alice in Wonderland, "a word means what [we] choose it to mean" and often we have to add modifiers or alternate terms to avoid ambiguity.Sun, 29 Mar 2026 15:23:00 GMThttps://chemistry.stackexchange.com/questions/182066/how-to-find-the-infrared-absorption-spectrum-of-o2-and-n2There is a good reason for not being able to find the mid-IR absorption spectra of nitrogen and oxygen. Their vibrations are infrared inactive. Infrared absorption peaks are observed when there is a change in the dipole moment during a vibration. In such cases, one can resort to rotational-vibrational Raman spectroscopy to get molecular information. Oxygen does absorb near the deep-red visible ...Sun, 29 Mar 2026 19:12:00 GMThttps://chemistry.stackexchange.com/questions/15126/enthalpy-of-the-reaction-between-hydrogen-and-oxygenIn this case, the enthalpy of $484\ \mathrm {kJ}$ is released when $2\ \mathrm {mol}$ of hydrogen gas react with $1\ \mathrm {mol}$ of oxygen gas to form $2\ \mathrm {mol}$ of gaseous water: $$\ce {2H2 (g) + O2 (g) -> 2H2O (g)}\qquad\Delta H^\circ = -484\ \mathrm {kJ}$$ (By way of comparison, the corresponding value for liquid water is about ...Wed, 01 Apr 2026 21:03:00 GMThttps://chemistry.stackexchange.com/questions/14417/what-is-the-origin-of-the-differences-between-the-mo-schemes-of-o%e2%82%82-and-n%e2%82%82S-p mixing is the primary cause of the difference in the molecular orbitals of nitrogen and oxygen, which is influenced by the initial atomic orbital energies. The lighter second period elements (prior to oxygen) have a relatively small difference in energy between the 2s and 2p orbitals. This allows sufficient s-p mixing to lower the energy of the σ (2s) and σ* (2s) molecular orbitals, and ...Fri, 27 Mar 2026 20:05:00 GMThttps://chemistry.stackexchange.com/questions/160359/what-is-the-lumo-and-homo-in-and-o2-diatomicIn the typical way these terms are used, the LUMO can't be the same as the HOMO. Since each of the pi spatial orbitals already have one electron, they are not unoccupied, so they can't be the LUMO. In the sense of singly occupied spin orbitals, you could say that these pi spin orbitals are the LUMO, but its fairly nonstandard to refer to spin orbitals when discussing HOMO/LUMO.Wed, 25 Mar 2026 07:42:00 GMThttps://chemistry.stackexchange.com/questions/75393/whats-the-difference-between-2o-and-o2I just saw something in a chemistry lesson what got me confused. What is the difference between $\\ce{2O}$ and $\\ce{O2}$? Thanks for the help!Sun, 29 Mar 2026 08:06:00 GMThttps://chemistry.stackexchange.com/questions/15058/why-is-o2-a-biradicalAnd finally there is $\ce {O#O}$ where both oxygens are positively charged and are free radicals. Why are both positively charged? It is because 3 bonds already to oxygen means 1 lone pair and 5 electrons around oxygen is +1. Is it because of these resonance structures giving 2 free radicals in $\ce {O2}$ that $\ce {O2}$ is considered a biradical?Sun, 29 Mar 2026 23:15:00 GMThttps://chemistry.stackexchange.com/questions/33780/why-does-carbon-monoxide-have-a-greater-affinity-for-hemoglobin-than-oxygenAlthough CO has a much greater affinity for a ferrous heme than does O2 (by a factor of about 25,000), the affinity of CO for deoxyhemoglobin is only about 200 times greater than that of O2, which suggests that something in the protein is decreasing its affinity for CO by a factor of about 100.Mon, 30 Mar 2026 14:03:00 GMThttps://chemistry.stackexchange.com/questions/186696/why-are-there-two-measurements-for-o2-concentration-in-flue-gases-dry-and-wetWhy is oxygen concentration in flue gases (biomass combustion, recovery boilers) reported in two forms: dry flue gases and wet flue gases? This raises several questions for me: Are flue gases everTue, 17 Mar 2026 16:06:00 GMT