elliepage5203 elliepage5203

04-05-2021
Chemistry

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O nióbio é um metal encontrado em jazidas naturais, principalmente na firma de óxidos. Em uma jazida que contenha nióbio com número de oxidação +5, a formula do óxido predominante desse metal corresponde a:

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joneszoey78 joneszoey78

04-05-2021

Answer:

what

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