Calculating Thermal Speed VTh with R Constant

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VTh= sqrt[(3RT)/M] where M is the molar mass

How do we determine which R constant to use?
 
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What do you mean? Do you suppose there is more than one?
 
Last edited:
nasu said:
What do you mean? Do you suppose there more than one?


Isn't the Boltzmann constant and the ideal gas constant?
 
Which constant has the proper units to fit into the equation?
 

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