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Use the References to access important values if needed for this question. The boride Nb3B4 is made by the direct combination of niobium and boron

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Use the References to access important values if needed for this question. The boride Nb3B4 is made by the direct combination of niobium and boron at high temperature. How much nioblum must react with excess boron to prepare 150g of Nb3B4 if the yield of the reaction is 94.4% ? grams Nb

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