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2. Shortly after his success with the cyclotron, Leo decided to construct a mass spectrometer in his lab. It looked just like the one we
2. Shortly after his success with the cyclotron, Leo decided to construct a mass spectrometer in his lab. It looked just like the one we discussed in class, shown on the right. The box at the upper left E is the molecule ionizer and velocity selector 1 = B1 that first ionizes the gas by removing one Sil S electron, giving it a net positive charge, then + runs it through the selector and inserts it into the area of the magnetic field with a specific B and velocity v. In the field, its path is bent in a qvXE E 2r half circle until it hits the detector at a distance 2 times the radius of the circle from the entrance port. Leo then measures that distance very accurately. No sooner had he Detector finished his device when he was asked by a or film welding company to do some forensics to figure out what happened in a work accident. What happened was two workers were sent into a large tank to weld a plate onto an inside wall. They were found dead two hours later by a security guard. There was nothing suspicious as the guard reported he saw them happily welding the plate into position. The company safety officers decided to take a sample of the air inside the tank before they entered. They asked Leo to run the sample through his device and see if he could tell what happened.First Leo took a mass spectrum of normal atmospheric air for comparison, then he took a mass spectrum of the air from the tank. This is what he got. Leo's Mass Spectrum of Atmospheric Air Leo's Mass Spectrum of Air Inside the Tank 1 Relative Amplitude Relative Amplitude 30 30 60 70 20 Radius demi Leo knew that the main constituents of air are given in the following table. He had adjusted his mass spectrometer so that the ions entered the magnetic field with a velocity of 1,000 m/'s and he had set the magnetic field value to be 5.5 gauss (5.5e-4 Gas Molecule Molecule T). Knowing these values: Mass (amu] Mass (kg] Oxygen Oz 32.00 5.31E-26 a) What were the radii he measured for each of Argon 39.95 6.63E-26 Water 18.02 2.99E-26 the gasses in his mass spectrometer? CO, 44.01 7.318-26 b) Which gasses corresponded to the labeled Nitrogen N2 28.01 1.65E-26 peaks, 1, 2, 3, 4, and 5? c) From comparing the atmospheric air spectrum with the spectrum from the tank air, what do you think happened to the welders (i.e. cause of death) and how do you think that occurred
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