15. Diisobutylaluminum hydride (DIBAL-H) can be used to carry out which of the following conversions?
a) Ester to aldehyde
b) Carboxylic acid to ester
c) 2 moles of alcohol to ketone
d) Aldehyde to carboxylic acid
c) Ester to ketones

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.