Chemistry

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ChemPaths: Learning to Meander

Last Updated (Sunday, 23 August 2009 13:07) Written by Administrator This site is the Student Access Portal of many of the Chemistry Education Digital Library collections! ChemPaths is the Student Portal of the Chemical Education Digital Library ( The ChemEd DL ), and has been built to assist instructors in providing a means to bring all of these multimedia resources into one cohesive package ready for student-use.
http://physics.nist.gov/cuu/Units/prefixes.html

Definitions of the SI units: The twenty SI prefixes

The 20 SI prefixes used to form decimal multiples and submultiples of SI units are given in

Activation, Deactivation and Regioselectivity in Electrophilic Aromatic Substitution - [www.rhodium.ws]

http://www.erowid.org/archive/rhodium/chemistry/eas-rate.html Here are some data illustrating the influence of substituents groups on the rates and the regioselectivities of various electrophilic aromatic substitution reactions.