1. A mass spectrometer is an analytical instrument used to separate collection of different atoms and molecules contained within a gaseous sample. First, the atoms/molecules in the sample are positively ionized, then accelerated (from rest) through a potential difference AV. They enter uniform magnetic field where the magnetic force bends the ions into circular trajectories. Because they have different velocities and masses, they will follow different circular arcs and be separated from each other. Consider a mass spectrometer with a 200.00 mT magnetic field directed as shown. A collection of carbon, nitrogen, and oxygen atoms are singlely ionized ( through a 950.00 Volt potential difference. What are the radii of the different trajectories followed by these three ions? Use the following constants: 1 u = 1.6605×10-27kg, e = 1.6022x10-19 C. T

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Post Lab Questions:
1. A mass spectrometer is an analytical instrument used to separate
collection of different atoms and molecules contained within a gaseous
sample.
AV
First, the atoms/molecules in the sample are positively ionized, then
accelerated (from rest) through a potential difference AV.
d
They enter uniform magnetic field where the magnetic force bends the ions
into circular trajectories. Because they have different velocities and masses,
they will follow different circular arcs and be separated from each other.
Consider a mass spectrometer with a 200.00 mT magnetic field directed as
shown. A collection of carbon, nitrogen, and oxygen atoms are singlely ionized (C*, N*, and O*) and accelerated
through a 950.00 Volt potential difference.
Detector
What are the radii of the different trajectories followed by these three ions?
Atomic masses
12C
12.000 u
14N
14.003 u
Use the following constants: 1 u = 1.6605×10-27kg, e = 1.6022x10-19 C.
B200.00MT or 0.200T
160
15.995 u
2. A separate gaseous sample contains molecular nitrogen ions (N2+) and
carbon monoxide ions (CO+). Both have nearly the same molecular mass of 28
u, but they are easily separated due to their different charges.
What accelerating voltage would you use to detect CO at a location 8.00 cm
below the point where the ions enter the magnetic field?
+
B
AV
Detector
Transcribed Image Text:Post Lab Questions: 1. A mass spectrometer is an analytical instrument used to separate collection of different atoms and molecules contained within a gaseous sample. AV First, the atoms/molecules in the sample are positively ionized, then accelerated (from rest) through a potential difference AV. d They enter uniform magnetic field where the magnetic force bends the ions into circular trajectories. Because they have different velocities and masses, they will follow different circular arcs and be separated from each other. Consider a mass spectrometer with a 200.00 mT magnetic field directed as shown. A collection of carbon, nitrogen, and oxygen atoms are singlely ionized (C*, N*, and O*) and accelerated through a 950.00 Volt potential difference. Detector What are the radii of the different trajectories followed by these three ions? Atomic masses 12C 12.000 u 14N 14.003 u Use the following constants: 1 u = 1.6605×10-27kg, e = 1.6022x10-19 C. B200.00MT or 0.200T 160 15.995 u 2. A separate gaseous sample contains molecular nitrogen ions (N2+) and carbon monoxide ions (CO+). Both have nearly the same molecular mass of 28 u, but they are easily separated due to their different charges. What accelerating voltage would you use to detect CO at a location 8.00 cm below the point where the ions enter the magnetic field? + B AV Detector
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