Recent content by opuktun

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    Undergrad Why is there hybridization of orbitals?

    Thank you alxm for your advice. Recently, I have been trying to figure out what I have been learning for over the past eight years. And I realized that I have taken some theories I have learned for granted.
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    Undergrad Why is there hybridization of orbitals?

    Yes, the concept of bonding is easy to understand - energetically driven to reach the stable state, i.e. one with lowest energy. But I felt there was this gap in my understanding of the chemical modeling and quantum mechanic calculation. That is why I think physicists would be best in...
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    Undergrad Why is there hybridization of orbitals?

    I'm a chemistry graduate. And yes, I sent the same question to a chemistry forum at the same time. But I am curious as to what chemists and physicists think of the concept of orbitals hybridization. :)
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    Undergrad Why is there hybridization of orbitals?

    Yup, I know about the basics of hybridization and the VSEPR theory and stuff. But the question is why does hybridization occur? Is it because of the lowering of energy of the chemical system?
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    Undergrad Why is there hybridization of orbitals?

    Hi, we often learn that orbital hybridization helps us in explaining the bond angle and bond length for simple molecules, e.g. CH4. But why is it that s and p orbitals undergo hybridization? Is it because the resulting hybridized orbitals are more stable?
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    Chemistry Molecule - Polar or Non-Polar?

    1) Yes, permanent dipole permanent dipole (H3COCH3) is stronger than London Dispersion force (H3CCH2CH3). 2) BP should be C2H5OH (stronger hydrogen bonding) > CH3OCH3 (pdpd) Yes, CCl4 would be a non-polar molecule.
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    Chemistry Molecule - Polar or Non-Polar?

    Read dichloromethane in http://dwb4.unl.edu/Chem/CHEM869E/CHEM869ELinks/www.uis.edu/7Etrammell/organic/introduction/polarity.htm
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    Calculating Diffusion Constant for Phosphatidylcholine in Water

    V = 1.58E-25 m3 is correct 3.35 nm is wrong... u key the values wrongly.
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    Chemistry Molecule - Polar or Non-Polar?

    No, I is more electronegative than C because it is halogen. Note that the molecule adopts a tetrahedral shape. Either way, the dipole moment will go from the in-between of 2 C-H bonds to the in-between of 2 C-I bonds
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    What Are the Effects of Carboxyl Groups on Electron Distribution?

    When we are discussing about meta/ortho/para positioning, we need a reference point. What is the functional group on benzene that OH is taken with respect to?
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    Smallest Atomic Radius: Cl-, K+, or Ar?

    Yes, I second to Borek answer. The logic is simple. Positive (nucleus) attract negative (electrons). So which is more in each atom? Positively charged species? Negatively charged species?
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    Solve Lone Pair & Coordination Bonding Issues in Hyperchem 8.0

    I don't know. I have never used SPARC before. Hyperchem's a modeling software, with official website here: http://www.hyper.com/ Any gurus around? :(
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    Solve Lone Pair & Coordination Bonding Issues in Hyperchem 8.0

    1. Is it possible to run an ab initio calculation on molecules with lone pair? I keep getting "basis file does not contain any definitons for element with atomic number 0" 2. Is there a way to show coordination bonding in hyperchem? Thanks.
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    What Are the Effects of Carboxyl Groups on Electron Distribution?

    electron withdrawing
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    Chemistry  Learn About Moles: 1.00 Mol of Oxygen Molecules

    just think of "moles" as a quantifying unit in order of magnitude: (small to big) "one", "ten", "dozen", "hundred", "thousand", "million", "billion", "moles" 1 dozen of something = 1 x 12 = 12 something 1 moles of something = 1 x 6.022 x 10^23 = 6.022 x 10^23 something