phải cô cạn bao nhiêu gam nước từ 60 gam dung dịch NaCl 20% để thu được dung dịch NaCl 24% ( toán liên môn)

Tim hieu cua so lien truoc va so lien sau cua so chan lon nhat co 5 chu so

từ đoạn trích (như nước đại việt ta từ trước ...song hào kiệt đời nào cũng có) anh chj hãy viết 1 đoạn văn khoảng 15-20 dòng trình bày suy nghĩ của anh chị về vấn đề bảo vệ Tổ Quốc hiện nay

giải thích nơi sống và thời gian kiếm mồi của ếch

Anh chị giúp em bài này với ạ em cảm ơn

Trên cùng một nửa mặt phẳng có bờ là đường thẳng AM.Từ một điểm O thuộc AM.Vẽ các tia OB,OC,OD sao cho;MOC =115 độ;BOC=70 độ;AOD=45 độ(D nằm trong nửa mặt phẳng đối với B,C qua bờ là AM) a)Tia OB nằm giữa hai tia OM,OC không?Vì sao? b)Tính góc MOB,AOC c)chỉ rõ rằng 3 điểm D,O,B thẳng hàng.

Phương pháp thu khí H2 trong phòng thí nghiệm

Choose the word that has the CAPITAL LETTER pronounced differently from that of the others. 1 point sUstainable statUs destrUction natUre Choose the word that has the CAPITAL LETTER pronounced differently from that of the others. 1 point biOdiversity biOgas biOlogy biOsphere Choose one word whose stress is placed differently from the others. 1 point successful cognitive different wonderful Choose one word whose stress is placed differently from the others. 1 point similar symbolic effective eternal When do you intend to TIE THE KNOT with your Japanese girl? 1 point break up fall in love get married live under the same roof Water pollution is a result of dumping POLLUTANTS such as detergents, pesticides, oil, and other chemicals in rivers, which makes the water unclean. 1 point substances stuffs contaminants wastes "Green" tourists or "eco-tourists" are UPSET by the effects of mass tourism. 1 point tense troubled nervous relaxed The United Nations has declared the celebration of the International Day of Ecotourism, to PROMOTE sustainable practices in this growing industry. 1 point favour raise boost delay Lily: “I’m sorry. I can’t be of more help in this matter”. –Tuan: “ ....................................................” 1 point Yes, the matter is helpless That’s fine. I understand You are welcome That’s a problem You must slow down in built-up areas. __ you drive in the city, it is ___ that you’ll have an accident. 1 point The faster and faster / the more The faster / the more probable The more and more fast / the more and more probable The more fastly / the probable “What’s the matter? You don’t look very well.” – “I feel a little __________.” 1 point under the weather out of the blue out of order down to earth "Why don't we go to Lionel's for dinner tonight?” - “Is that the new restaurant ____ has just opened on the other side of town?" 1 point which where that it which it Women and men must have equal......................................to shape society and their own lives. 1 point directions ways behaviours rights There will be ____, too. Some areas will become wetter while others will become much drier. 1 point weather changes weather forecasts climatic change climate changes If you buy souvenirs made from endangered animals or plants, you ____ contribute to making them become extinct. 1 point would might could are

giúp em bài toán này với em cần gấp ạ

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