0.03mol铜完全溶于硝酸,产生氮的氧化物(NO.NO2.N2O4)混合气体共

003mol铜完全溶于硝酸,产生氮的氧化物(NONO2N2O4)混合气体共005mol。该混合气体的平均相对分子质量可能是

    A30               B46               C66               D69

答案

B

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