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不能用濃硫酸乾燥二氧化氮的,因為兩者會發生反應. 二氧化氮與濃硫酸反應生成了亞硝基硫酸NOHSO4
濃硫酸和銅反應後變稀,當濃硫酸稀到一定程度時,無法和銅反應生成二氧化硫,所以最終的二氧化硫低於0.92mol.
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