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CIE 2012 Oct/Nov discussion!!!

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even i wrote zinc..

anyways: why was the zinc reweighed?
why was there a reduction in the mass of ZnO
Since Zno was obtain by the thermal decomposition of Zn(o3)2, wen d 1st redin was tken not all Zno3 had decomposed hence the result for d first time was incorrect.
It was reweighed so that onlly the mass of Zno could be found out....
 
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