Solving a problem in chemistry section 10 point 31

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31. The sample is a mixture of potassium chlorate and potassium dichromate weight 19.50 g calcined and got 0.672 liters (eg. In.) Of gas. Another sample of the starting mixture was treated with the same weight of concentrated hydrochloric acid and 6.72 L received (eg. In.) Of gas. Determine the weight fraction of impurities in the starting mixture.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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