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anbinhphuongngoc
2 năm trước
Câu 4: Cho 4,8g Mg tác dụng vừa đủ 100g dung dịch axit HCL. Tính nồng độ % của dung dịch axit HCL đã dùng? Câu 5: Thả một miếng đồng vào 400ml dd AgNO3 phản ứng kết thúc người ta thấy khối lượng miếng đồng tăng thêm 3,04 gam so với ban đầu. Tính nồng độ mol của dung dịch AgNO3 đã dùng? Câu 6: Nếu rót 200 ml dung dịch NaOH 1M vào ống nghiệm đựng 400 ml dung dịch HCL 1M thì dung dịch tạo thành sau phản ứng có pH là bao nhiêu ? Câu 7: Để pha 400ml rượu 40 độ người ta cần dùng bao nhiêu ml nước và bao nhiêu ml rượu etylic? ( xin lỗi vì lại một lần nữa làm phiền các bạn nhưng giúp mk nốt nha, mk đang cần bài lắm)
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