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# Mass spectrometer

Created by Jay.

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• So... Mass Spectrometry is used in Organic Chemistry, but this isn't in the Organic Chemistry section with examples. Is that in the works? Or am I just looking in the wrong section of Organic Chem?
• Mass spectrometry applies physics concepts to be used for identification and separation in chemistry, of which organic chemistry is a branch. Gotta love the overlap in science.
• can anyone clearly explain the meaning of mass spectrometer I cant understand
• The end result is a literal spectrum based on the mass of the samples injected.
• does it only work for electropositive atoms or even the electronegative ones, just curious~~
(1 vote)
• works for both. buth motion will be in opposite direction
• what is the difference between centripetal force and centripetal acceleration I am getting confused between these two vocabularies
• Centripetal force is the force vector acting upon a particle moving in a circular path at a distance r from some center point. Since the force vector points inwards towards the center point, so too does the acceleration vector. Since mass is a scalar, only the acceleration vector on the 'ma' side of the equation can give the force vector its direction.
• how do you know which ions are responsible for each peak in a mass spectrometer graph
(1 vote)
• the x axis is the mass number so is in ascending order and you can see at which mass the peeks are.
some ions are heavier than others so you would see peaks based on the different masses. you can find out which peak corresponds to which ion based on mass since you can see (on a periodic table or some other pre-calculated chart) what mass number corresponds to which ion.
• how din F(B)= qv.B ? and, how did v^2= 2qv/m
(1 vote)
• F(B) = qvB as Force of the magnetic field is just the charge by the velocity by the magnetic field interaction
v^2 = 2qV/m is just rearranging qV = 1/2 mv^2 to solve for v^2 then taking the square root of this to find the velocity.
• If we have an electron instead of a proton, does the direction of the magnetic and electric field change? and why?
(1 vote)
• In one question elsewhere on the Khanacademy website, it was said that the molecule with the largest mass will have the least deflection during mass spectrometry. What exactly is deflection- I assumed the one that had the larger r would be deflected more.

Thanks!
(1 vote)
• The higher mass molecules take more force to be moved due to their inertia - because they have a higher mass, it is harder to change their velocity. Hence, the magnetic force acting on them results in less movement.
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• what is the use of the voltage or potential difference in mass spectrometry?
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• mass spectr is applied in organic chemistry where TMS (tetralmethyl silane) is kept as reference for MS plot,, how is it workin' in chem??
(1 vote)