(Figure 1) shows a mass spectrometer, an analytical instrument used to identify the various molecules in a sample by measuring their charge-to- mass ratio q/m. The sample is ionized, the positive ions are accelerated (starting from rest) through a potential difference AV, and they then enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased, different ions reach the detector and are measured. Consider a mass spectrometer with a 200.00 mT magnetic field and an 8.0000 cm spacing between the entrance and exit holes. Part A To five signi electron is le Atomic mas 12C 14N 160
(Figure 1) shows a mass spectrometer, an analytical instrument used to identify the various molecules in a sample by measuring their charge-to- mass ratio q/m. The sample is ionized, the positive ions are accelerated (starting from rest) through a potential difference AV, and they then enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased, different ions reach the detector and are measured. Consider a mass spectrometer with a 200.00 mT magnetic field and an 8.0000 cm spacing between the entrance and exit holes. Part A To five signi electron is le Atomic mas 12C 14N 160
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Transcribed Image Text:Part B
What accelerating potential difference AV is required to detect N₂ ?
Express your answer with the appropriate units.
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AVN = 462.35
μA
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Part C
X Incorrect; Try Again; 9 attempts remaining
AVco+= 1435
V
Although N and CO+ both have a nominal molecular mass of 28, they are easily distinguished by virtue of their slightly different accelerating voltages. What accelerating
potential difference AV is required
etect CO+?
Express your answer with the appropriate units.
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μÃ
?
V
?

Transcribed Image Text:(Figure 1) shows a mass spectrometer, an analytical instrument used to
identify the various molecules in a sample by measuring their charge-to-
mass ratio q/m. The sample is ionized, the positive ions are accelerated
(starting from rest) through a potential difference AV, and they then enter a
region of uniform magnetic field. The field bends the ions into circular
trajectories, but after just half a circle they either strike the wall or pass
through a small opening to a detector. As the accelerating voltage is slowly
increased, different ions reach the detector and are measured. Consider a
mass spectrometer with a 200.00 mT magnetic field and an 8.0000 cm
spacing between the entrance and exit holes.
igure
+
AV
d
Detector
< 1 of 1 >
Part A
To five significant figures, what accelerating potential difference AV is required to detect the ion O,? The masses of the atoms are shown in the table; the mass of the missing
electron is less than 0.001 u and is not relevant at this level of precision. Use the following constants: 1 u = 1.6605 x 10-27 kg, e = 1.6022 × 10-1⁹ C.
Atomic masses
12C
14N
160
Express your answer with the appropriate units.
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Submit
12.000 u
14.003 u
15.995 u
O
AVo = 96.793
Part B
μA
Previous Answers
V
www.
?
X Incorrect; Try Again; 8 attempts remaining
You need to use the values of the constants with more significant figures to solve the problem.
What accelerating potential difference AV is required to detect N/?
Express your answer with the appropriate units.
► View Available Hint(s)
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