2011年6月26日 · O might also mean oxygen as the element without specifying its chemical form; O2 can only mean dioxygen gas. Anyway, 1 mole of oxygen gas contains 2 mole of oxygen atoms. It is the same as 1 dozen pairs of shoes and 2 dozen shoes. Mole is a number, like dozen.

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2011年1月6日 · The difference between the size of CO2 (3.3) and He (2.6) is about the same as the difference between O2 (3.5) and Ne (2.. Because He diffuses about twice as fast as CO2 according to those two catheter books I’d expect Ne to diffuse about twice as fast as CO2 so is there any evidence that it does so?

2007年8月8日 · Why we evolved to use oxygen, I'm not sure but I would guess it would have something to do with the relative abundance of things like O2, glucose, and water, and the energetic payout at the end, since not all redox reactions produce the same amount of energy. Here's an interesting little factoid.

Could the battery in a wrist watch,which always covered a mole on my left wrist,cause that mole which had been there for years to become a malignant melanoma.The melanoma has been removed by wide excision.Surgeon told me of research going on in the long term use of battery powered cellphones etc.I have bi-lateral hearing aids also battery powered.

2008年8月10日 · One mole of certain gas is confined in a container. Suppose every molecule has decomposed and given rise to- two new molecules. Let's assume (for this purpose ) it requires negligible amount of energy for the molecule to decompose (or not any energy at all).

2024年5月21日 · Chris - When I train an AI, if I'm doing a really good job and I want to train it to recognise cancerous moles, I train it to recognise a mole, then I train it to recognise cancerous moles from healthy moles. But it's focusing on moles. I'm not distracting it with pictures of mathematical formulae or daisies and tomatoes.

2017年10月29日 · Does all of the water turn into steam? If so, as @Bored chemist has pointed out, the number of moles of steam is identical to the number of moles of water, because although the phase has changed (liquid → gas) the mass of water is the same; and since moles = mass (g) / Relative Molecular Mass (RMM), and neither the mass nor the RMM changes, then the number of moles of water remains constant.

2010年8月1日 · If you look at the case of burning carbon the energy released is due to the greater bond energy of CO2 compared to the bond energies of the O2 and the Carbon. The energy released from burning magnesium is so large that it is "worthwhile" to decompose CO2 to C …

2013年12月18日 · So what he suggest is that "1 mature tree can store 21,772416 kg CO2 per year and give 118 kg O2 per tree per year," right? The first number seems to come from "A single mature tree can absorb carbon dioxide at a rate of 48 lbs./year and release enough oxygen back into the atmosphere to support 2 human beings." - McAliney, Mike.