Cho 10,0 l H2 và 6,72 l Cl2(đktc) tác dụng với nhau rồi hòa tan sản phẩm vào 385.4 g H2O ta thu được dung dịch X. Lấy 50 g dung dịch X cho tác dụng với dung dịch AgNO3 dư thu được 7,175 g kết tủa. Tính hiệu suất của phản ứng giữa H2 và Cl2

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