14C_f10_e02

14C_f10_e02 - Chemistry 14C Fall 2010 Exam 2 Page 1 1. (2)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 14C Fall 2010 Exam 2 Page 1 Page 1 score = 1. (2) Circle the spectroscopic method(s) that involve interaction of molecules with magnetic fields: MS IR 1 H-NMR 13 C-NMR MRI X-ray diffraction 2. (5) Circle 'can' or 'cannot' as appropriate for each statement. If you circle 'cannot', complete the sentence by adding no more than ten words in each case. (a) The structure of DNA can / cannot be analyzed by x-ray diffraction because. .. (b) The structure of ice can / cannot be analyzed by x-ray diffraction because. .. (c) The structure of Coca-Cola can / cannot be analyzed by x-ray diffraction because. .. Combustion of tobacco releases hundreds of different substances, many of which are also produced by other processes. 2,5-Dimethylfuran has been identified as a tobacco combustion product that is not produced by any other process, and therefore might be a tool to study exposure to second-hand smoke. Mass spectrometry is a useful tool to determine the presence of this molecule. O H 3 C CH 3 2,5-Dimethylfuran 3. (6) Predict the mass spectrum of 2,5-dimethylfuran by writing a number in the blank with the indicated number of decimal places. (a) The m/z for M is ______________ (no decimal places). (b) When M = 100%, the relative intensity of M+1 is ______________ (one decimal place). (c) When M = 100%, the relative intensity of M+2 is ______________ (no decimal places). 4. (6) Circle 'definitely is', 'might be', or 'cannot be' to best complete each statement. In the mass spectrum of 2,5-dimethylfuran, a peak at m/z = 81. ... (a) .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/06/2011 for the course CHEM 140A taught by Professor Whiteshell during the Fall '04 term at UCSD.

Page1 / 7

14C_f10_e02 - Chemistry 14C Fall 2010 Exam 2 Page 1 1. (2)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online