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i49bsdzs's Avatar
i49bsdzs
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22 Jul 2012 16:46:53 IST
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Stoichiometry
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490 g of KClO3 on heating shows a weight loss of 0.384g. what % of the original KClO3 has decomposed?


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Sagar Saxena's Avatar

Sagar Saxena
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Joined: 8 Oct 2008
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28 Jul 2012 18:46:34 IST
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 HELLO

2KCLO3--->2KCL+3O2

      NO.OF MOLES O2 FORMED=.384/32= .012

          MOLES OF KCLO3 DECOMPOSED=.012*2/3=.008

          MASS OF  KCLO3 DECOMPOSED=.008*102.5=.82 GRAM.

                    %KCLO3 DECOMPOSED=.82/490 *100=1.6 ANS.
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