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Molecular Orbitals and Walsh Diagram: BeH2

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I have attached a four part question concerning bond lengths. I am confused on the topic and we will have a question similar to this one on our next exam. I would like to increase my understanding before the exam. Please include as much information and assistance as possible. Thank you for the assistance.

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This solution starts with a detailed background discussion and then logically deduces the specific answers to the problem. Diagrams and tables included in the solution augment better understanding.

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  • "Thankyou for the feedback. I have a few question though; With the first statistic about cost below... “According to Sigma-Aldrich catalog, cost of 1L octane is AUD $ 392.00, whereas the cost of 1L ethanol is AUD $196.00. Moreover, if ethanol is obtained from sugar industry as a by-product, it may cost even less. Source of oxygen is ambient atmosphere, so it costs nothing. So ethanol is much cheaper than petrol, in fact it is half-priced: AUD $ (392-196) = $ 196.” I didn't think it made sense because the cost of petrol per litre is normally a dollar something or even less than a dollar not a couple of hundred of dollars. For example, a statistic that I found in america was: "U.S. ethanol production costs are about $1.20 per gallon of ethanol, or $1.82 per gallon on a gasoline-equivalent basis." However, I was wondering whether you could find an Australian statistic. Also, you mentioned that H20 is not a greenhouse gas. However, in the combustion equations it is actually carbon dioxide and water vapour which are produced and they are both greenhouse gases. Finally, how do I calculate the energy efficiency of ethanol and petrol? "
  • "Thank you!"
  • "Didnt really answer my questions but gave me a start at least."
  • "Once again this is tremendous help I can't thank you enough for not only working the problem but explaining in detail how and why!! KR"
  • "Awesome thank you so much for the help!!!"
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