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calculate mass of MnO2 if 1 mole of KMnO4 completely burnt. 2KMnO4 -> K2MnO4+MnO2+O2​

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rspill6

Answer:  80 grams

Explanation:  

2KMnO4 -> K2MnO4+MnO2+O2​

2 moles of KMnO4 would produce 1 mole of MnO2, so 1 mole of KMnO4 would produce 0.5 moles of MnO4.  The molar mass of MnO4 is 160 g/mole.  1/2 mole of KMnO4 would therefore be (160 g/mole)*(0.5 moles) = 80 grams.

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