D7: but why did the mass INCREASE? #cliffhanger #teach180 #modchem http://pic.twitter.com/qsIkoED8PK
— Laura Wang (@laura_c_wang) September 15, 2017
D7: but why did the mass INCREASE? #cliffhanger #teach180 #modchem http://pic.twitter.com/qsIkoED8PK
— Laura Wang (@laura_c_wang) September 15, 2017
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