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hoatuongvi2208
2 năm trước
Thêm 200g H2O vào dung dịch chứa 40g NaOH thì thu được dung dịch X có nồng độ mol giảm đi 50%. Cho 200ml dd X phản ứng vừa đủ với 100g CuSO4 thu được kết tủa và dung dịch Y a, Tính khối lượng chất kết tủa b,Tinh C% của muối có trong dung dịch Y
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Write one word in each gap. 24th June We had our English exam today. It was a disaster! We all sat there nervously, waiting for Mrs. Jennings to say we could start. Finally, she told us to turn in our exam papers..................... Then she read.........................the instructions to make sure we all understood. We had to write three essays in two hours! We weren't allowed to look.........................any words in the dictionary, and we had to write in pen. That meant we couldn't rub anything..................... if we made a mistake. We had to cross it...........................neatly or just rip........................the whole piece of paper and start again. So, I read through the three-question very carefully and thought about what I was going to write. I'd just written my name..................at the top of the first piece of paper, and was about to start writing the first essay, when Mrs. Jennings pointed........................that there were only five minutes left. Oh, dear! P/s:bài này mk học trong chủ đề Learning and Doing nên từ cần điền liên quan tới chủ đề này

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