Discovering Constant B in Rotational Spectroscopy of CO Molecule"

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To determine the rotational constant B for the CO molecule from its microwave spectrum, one must first understand the relationship between the moment of inertia and the spectrum. If the molecule is non-elastic, focus on using the spectrum directly to extract B. In cases where elasticity is considered, both B and Dj need to be calculated, which may involve fitting the spectrum to specific equations. The moment of inertia can be calculated if the bond length R is known, but if R is uncertain, it complicates the process. Clarifying the relevant equations and fitting methods is crucial for accurate analysis.
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Please follow the template when posting your questions in the HW section.
So I am given a rotational microwave spectrum of a molecule (CO specifically) and I have to find the constant B if it's not elastic , the constants B and Dj if it is elastic. Anyone know how to do that? :frown:
 
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Do I start by finding the moment of inertia? or do I use the spectrum? I have a problem with the moment of inertia I can't find the distance R...
 
What are formulas for both cases? Have you tried to fit the spectrum to them?
 
Borek said:
What are formulas for both cases? Have you tried to fit the spectrum to them?
sorry english is not my native language and I'm not sure i understand what you're saying... you mean the equations?
 
Yes.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
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