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2MnCO3(s)+O2(g)2MnO2(s)+2CO2(g) In the second step, manganese(IV) oxide and aluminum react to form manganese and aluminum oxidide: 3MnO2(s)+4Al(s)3Mn(s)+2Al2O3(s) Suppose the yield of the first step is

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2MnCO3(s)+O2(g)2MnO2(s)+2CO2(g) In the second step, manganese(IV) oxide and aluminum react to form manganese and aluminum oxidide: 3MnO2(s)+4Al(s)3Mn(s)+2Al2O3(s) Suppose the yield of the first step is 67.% and the yield of the second step is 97.%. Calculate the mass of manganese(II) carbonate required to make of manganese. Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits

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