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      <title>Buổi 14. Oxygen và không khí (p.2) by Hong Tran</title>
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      <description>28.11</description>
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      <pubDate>2021-11-28 11:58:41 UTC</pubDate>
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         <title>Nguyễn Đức Quyền</title>
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         <pubDate>2021-11-28 12:31:31 UTC</pubDate>
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         <title>Nguyễn Sơn Tùng</title>
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         <pubDate>2021-11-28 12:32:30 UTC</pubDate>
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         <title>Nguyễn Hoàng Hải</title>
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         <pubDate>2021-11-28 12:33:56 UTC</pubDate>
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         <title>VŨ HUY SƠN TÙNG</title>
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         <pubDate>2021-11-28 12:37:29 UTC</pubDate>
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         <title>Nguyễn Lê Quang</title>
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         <pubDate>2021-11-28 12:38:03 UTC</pubDate>
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         <title>Bá Hải</title>
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         <pubDate>2021-11-28 12:55:50 UTC</pubDate>
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         <title>Ở điểu kiện thường, oxygen là khí không màu, không mùi, không vị, tan ít trong nước, nặng hơn không khí, duy trì sự cháy và sự sống. Độ tan của oxygen trong nước phụ thuộc áp suất không khí và nhiệt độ nước, trung bình ở 20 độ C, áp suất không khí 1atm thì 1L nước hòa tan được 31 mL khí oxygen)</title>
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         <link>https://padlet.com/hongatran15/197az6ocpe8epbji/wish/1929094162</link>
         <description><![CDATA[<div>Video cách kiểm tra nồng độ oxygen tan trong nước.</div>]]></description>
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         <pubDate>2021-12-05 00:07:24 UTC</pubDate>
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         <title>Oxgen hiện diện trong không khí, trong nước, trong đất, là chất khí cần thiết cho sự hô hấp của sinh vật.</title>
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         <description><![CDATA[<div>Video kiểm tra sự có mặt của khí oxygen trong đất: cho đất vào nước, sẽ thấy bọt khí nổi lên, đó chính là khí thoát ra từ đất, dưới dạng bọt khí.</div>]]></description>
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         <pubDate>2021-12-05 00:09:36 UTC</pubDate>
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         <title>Oxygen hóa lỏng ở -183 độ C, hóa rắn ở -218 độ C. Ở thể lỏng và rắn, oxygen có màu xanh nhạt. </title>
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         <pubDate>2021-12-05 00:25:52 UTC</pubDate>
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         <title>oxygen ở thể rắn</title>
         <author>hongatran15</author>
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         <pubDate>2021-12-05 00:26:39 UTC</pubDate>
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         <title>oxygen ở thể lỏng</title>
         <author>hongatran15</author>
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         <pubDate>2021-12-05 00:27:04 UTC</pubDate>
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         <author>hongatran15</author>
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         <pubDate>2021-12-05 00:42:25 UTC</pubDate>
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      <item>
         <title>Oxygen dùng trong hàn cắt kim loại </title>
         <author>hongatran15</author>
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         <pubDate>2021-12-05 00:43:10 UTC</pubDate>
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         <author>hongatran15</author>
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         <pubDate>2021-12-05 00:46:05 UTC</pubDate>
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         <title>Khí Oxygen trong bình khí có tác dụng hỗ trợ cho bệnh nhân bị ngạt khí, ngộ độc khí, suy hô hấp, tổn thương cơ quan hô hấp, phổi và tim, ... Ngoài ra, vì lượng oxygen hòa tan trong nước thấp nên thợ lặn cũng cần dùng bình nén khí để cung cấp oxygen trong suốt quá trình ở dưới nước. Những người làm việc trong môi trường thiếu dưỡng khí như phi hành gia, lính cứu hỏa, thợ mỏ,… cũng cần có bình nén khí để cung cấp oxy giống như thợ lặn.</title>
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         <pubDate>2021-12-05 00:50:04 UTC</pubDate>
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         <title>video minh họa cơ chế phát sáng của pháo hoa cầm tay: lợi dụng phản ứng cháy của kim loại với oxygen.</title>
         <author>hongatran15</author>
         <link>https://padlet.com/hongatran15/197az6ocpe8epbji/wish/1929110135</link>
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         <pubDate>2021-12-05 00:53:39 UTC</pubDate>
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         <title></title>
         <author>hongatran15</author>
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         <pubDate>2021-12-05 00:55:39 UTC</pubDate>
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         <title></title>
         <author>hongatran15</author>
         <link>https://padlet.com/hongatran15/197az6ocpe8epbji/wish/1929111093</link>
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         <pubDate>2021-12-05 00:56:32 UTC</pubDate>
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         <title>Thí nghiệm minh họa Oxygen cần cho sự cháy</title>
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         <pubDate>2021-12-05 00:57:39 UTC</pubDate>
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      <item>
         <title>Phí Ngọc Quang</title>
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         <pubDate>2021-12-05 12:13:52 UTC</pubDate>
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      <item>
         <title>lê giang đông</title>
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         <pubDate>2021-12-05 12:15:51 UTC</pubDate>
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         <title>Nguyễn Lê quang lần 2</title>
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         <pubDate>2021-12-05 12:17:13 UTC</pubDate>
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         <title></title>
         <author></author>
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         <description><![CDATA[<div>Đan Thanh<br><br></div>]]></description>
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         <title>lê giang đông</title>
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         <pubDate>2021-12-05 12:22:54 UTC</pubDate>
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         <title>Điều gì sẽ xảy ra khi oxy trên TĐ biến mất trong 5 giây?</title>
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         <pubDate>2021-12-12 10:33:17 UTC</pubDate>
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         <title>Phải có chất cháy, nhiệt độ và oxy. Chất cháy phải nóng đến nhiệt độ cháy; Chất cháy phải tiếp xúc và có đủ oxy cho sự cháy.</title>
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         <pubDate>2021-12-12 10:56:27 UTC</pubDate>
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         <title>Tuyệt đối không dùng nước dập đám cháy dầu, mà phải cách ly chất cháy với oxy.</title>
         <author>hongatran15</author>
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         <pubDate>2021-12-12 10:57:50 UTC</pubDate>
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         <title>Nguyên tắc dập tắt sự cháy: Hạ nhiệt độ của chất cháy xuống dưới nhiệt độ cháy và/hoặc cách ly chất cháy với oxy.</title>
         <author>hongatran15</author>
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         <pubDate>2021-12-12 10:59:55 UTC</pubDate>
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         <title></title>
         <author>hongatran15</author>
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         <pubDate>2021-12-12 11:01:57 UTC</pubDate>
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         <title>Nguồn oxy cung cấp cho Trái Đất chủ yếu đến từ đâu?</title>
         <author>hongatran15</author>
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         <pubDate>2021-12-12 11:02:37 UTC</pubDate>
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         <title>Em có biết: Trái Đất đã từng xảy ra thảm họa tuyệt chủng vì oxy (The Great Oxygen Event)?</title>
         <author>hongatran15</author>
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         <title>Trong không khí có: khoảng 78% khí Nitrogen; khoảng 21% khí oxy và xấp xỉ 1% các khí khác bao gồm hơi nước, khí cacbonic, v.v...</title>
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         <title>Thí nghiệm chứng minh thành phần Oxy trong không khí</title>
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