Chemistry, 26.07.2019 20:30 crawford184232323234
why the recrystallization of the diels-alder product, 9,10-dihydroanthracene-9,10-dicarbo xylic anhydride, was only approximately 60%?
a - the product evaporated with the solvent during the recrystallization
c - the product is partially soluble in xylene
d - there was some lost by sublimation
Answers: 2
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The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles
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Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
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why the recrystallization of the diels-alder product, 9,10-dihydroanthracene-9,10-dicarbo xylic anhy...
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