Recent content by ChopChop

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    Physical Chemistry terminology

    I'm not sure, either. Maybe it has something to do with bond order?
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    Physical Chemistry terminology

    Thank you for the much needed clarification! :) Is it possible to estimate bond energy and bond dissociation energy from just looking at the molecule? Here the professor asks: Estimate the bond energy and bond dissociation energy for 2D79Br based on the isotope 1H79Br. But my book...
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    Physical Chemistry terminology

    I'm just having a difficult time trying to differentiate between variables used and terms thrown around in PChem. :confused: First of all, what is the difference between "bond energy" and "bond dissociation energy" in a Morse potential curve? I thought they were interchangeable. Also, does...
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    When was U-238 and U-235 50% at the same time?

    Thanks for replying :) but please bear with me - I learn pretty slow. :blushing: When you say absolute figures, what do you mean? I tried googling. Are they the same as absolute values? Baaarrghh...what? Do I need to look up the exact amount today? Wait - is that why you made the base a "2"...
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    When was U-238 and U-235 50% at the same time?

    Homework Statement The uranium present in Earth today is 99.28% for U-238 and 0.72% for U-235. The half-life of U-238 is 4.51E9 years and 7.0E8 years for U-235. How long ago was this uranium 50% U-238 and 50% U-235? Homework Equations A=Aoe-ktThe Attempt at a Solution This is driving me nuts. I...
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    Archived Why Do We Convert Grams to Kilograms When Calculating RMS Speed in Gases?

    Homework Statement The atmosphere is composed primarily of nitrogen N[SIZE="1"]2 (78%), and oxygen O[SIZE="1"]2 (21%). Find the rms speed of N2 and O2 at 293K Homework Equations Vrms=\sqrt{}((3RT)/M) The Attempt at a Solution V[SIZE="1"]rms, O2=\sqrt{}((3*8.31J*293K)/(32g/mol))...
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