EIPrelabanswers

EIPrelabanswers - Prelab questions 1 What is the ionization...

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Prelab questions: 1. What is the ionization potential of argon (cite source in answer)? 15.76 eV, webbook.nist.gov 2. Does the mass of an atom or molecule change upon ionization? Yes, it decreases by the mass of the electron if it is a positive ion, it increases by the mass of an electron if it is a negative ion. Mass of an electron is 0.00054858 amu or 511 MeV. Technically the mass will also change by any energy required for the process, but with current instrumentation that shift is negligible. 3. Compute the monoisotopic mass/charge ratios (to 4 decimal places) for the following ions: Ar +• , O 2 +• , H 2 O +• , CH 3 NH 2 +• , 13 CH 3 NH 2 +• , CH 4 N + , CH 2 N +• , CO +• , N 2 +• , and CH 3 + . 39.9618 for Ar +• 31.9893 or O 2 +• 18.0100 for H 2 O +• 31.0417 for CH 3 NH 2 +• 32.0450 for 13 CH 3 NH 2 +• 30.0338 for CH 4 N + 28.0182 for CH 2 N +• 27.9944 for CO +• 28.0056 for N 2 +• 15.0229 for CH 3 + 4. Given a split ratio of 40:1, a 10 mg/L solution and a 2
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This note was uploaded on 01/18/2012 for the course C 613 taught by Professor Davide.clemmer during the Spring '08 term at Indiana.

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EIPrelabanswers - Prelab questions 1 What is the ionization...

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