化学一题(please help)1.92克铜与50mL 2mol/L 硝酸完全反应,假设反应后溶液体积仍是50mL,求溶液中硝酸根离子的摩尔浓度?再要加入多少 mL 4mol/L氢氧化钠溶液,才能使铜离子恰好全部转化为氢氧化铜
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一题高中数学题（only one……please help help me.）救人一命胜造七级浮屠!
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