Chemistry
Senior High
二クロム酸カリウムK2Cr2O7 3.0×10^22個に含まれるカリウム原子は何molか、という問題を有効数字2桁で答える問題がわかりません
ニクロム酸カリウム K2Cr2O73.0×1022個に含まれるカリウム原子は何mol か。
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