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sau: ZnO22- + 2H+ → Zn(OH)2 ↓ (1) ZnO22- + 4H+ → Zn2+ + 2H2O (2) c Nếu x ≥ 4n0 thi ta chỉ viết một phản ứng sau: ZnO22- + 4H+ → Zn2+ + 2H2O d nếu x > 2n0 thi H+ dư nên ta chỉ viết một phản ứng sau: ZnO22- + 4H+ →... Cơ sở sản xuất bánh kẹo là nhà máy công nhiệp hóa dầu thi việc sử dụng các mỏ dầu đạt hiệu quả kinh tế cao nhất là: a Thác dầu thô rồi xuất khẩu càng nhanh càng tốt b Lập nhà máy lọc dầu để biến dầu thô thành sản phẩm chế biến rồi mới xuất khẩu xăng dầu c Lập nhà máy lọc dầu và nhà máy hóa dầu để thu được xăng dầu và các sản phẩm hóa dầu rồi mới xuất khẩu sản phẩm d Một số... nên tinh bột đã làm cho tờ giấy có tẩm iot hóa xanh 186 thi áp suất của một lượng khí cho trước tỉ lệ nghịch với thể tích V Điền vào chỗ trống ( ) một trong những câu sau: a Phương trình Mendeleev – Clapeyron: pV = nRT b Khi nhiệt độ T và áp suất p không đổi c Khi nhiệt độ T và thể tích V d Khi T không đổi thi e Khi p không đổi thi 187.Cho dung dịch X chứa n0 mol Al3+ tác... toán hóa quá rắc rối và phức tạp b Phương trình phản ứng hóa học chính là một hệ thức c 02 mol Al2(SO4)3 thi có d Có 4 chân gà trong 2 con gà nên 0,4 mol Al chứa trong e Chỉ cần thấy được cấu tạo phân tử của chất và biết cách áp dung định luật bảo toàn nguyên tố và khối lượng 198.Hiện nay các nước tiên tiến sử dụng bao bì có nguồn gốc là cellulose vì khi bao bì là cellulose thi ... không được gọi là phản ứng xà phòng hóa: a 1, 3, 4, 5, 6, 7 b 1, 3, 4, 7 c 1, 4, 6, 7 d 1, 4, 6 e Tất cả đều sai 72.Cho dung dịch X chứa n0 mol Zn2+ tác dụng với dung dịch Y chứa x mol OH- Tìm câu phát biểu sai: a Khi x ≤ 2n0 thi phản ứng tạo kết tủa lớn nhất khi xảy ra dấu “=” hay tạo kết tủa và còn dư Zn3+ nếu xảy ra dấu “