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銅と希硝酸、濃硝酸の反応式はよく出ます。君は濃いよ(希38濃14)という銅と希硝酸、濃硝酸の反応比を覚えとくと便利です!あと、銅や銀と反応する物質が希硝酸ならNO、濃硝酸ならNO₂、熱濃硫酸ならSO₂が発生することは絶対覚えときましょう!

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