Đốt cháy hoàn toàn hỗn hợp M gồm hai rượu (ancol) X và Y là đồng đẳng kế tiếp của nhau, thu được 0,3 mol CO2 và 0,425 mol H2O. Mặt khác, cho 0,25 mol hỗn hợp M tác dụng với Na (dư), thu được chưa đến 0,15 mol H2 . Công thức phân tử của X, Y là

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Write the correct form of the words given in capital letters: 1. My school is the …………………..one in Thanh Oai District. (OLD) 2. All of us are are very good ………………….. (STUDY) 3. In our school library, there are four ………………….. (BOOKSHELF) 4. Hung visits his grandparents …………………..a week. (ONE) 5. My house is on the …………………..floor of that tall building. (NINE) 6. Nobody in my class is …………………..than Trang. (GOOD)

Mr. Thompson ........................................... (cook) dinner in the kitchen. Mrs. Thompson ........................................... (clean) their car in front of their house. Jack and Eve ........................................... (sit) in the hall near the fireplace. Jack, their 11 years old son, ........................................... (read) Shakespeare's sonnets. Eve, at the age of 16, ........................................... (play) with Barbies. Their grandma and grandpa ........................................... (have) a good time. Their grandma ........................................... (exercise) in the gym. Their grandpa ........................................... (iron) shirts and socks in the living room. They also had two pets. And do you know what they ........................................... (do)? Spot, the puppy, ........................................... (catch) mice in the garden. And Kitty, the little cute kitten, ........................................... (fight) with neighbour's dog. Giúp mị nha mn

1. We use (A) to walk (B) miles to school every day due to lack (C) of public (D) transport. 2. You are not allowed (A) to drive (B) faster than (C) the number on a limit speed (D) sign. 3. A sign (A) within a red (B) triangle will warn (C) people for (D) something. 4. Be careful (A) when you are on (B) roads. You must (C) drive fast or

Giúp mình bài 83 84 với minh6 k biết làm

I. Fill in the blanks with the correct prepositions. 1. I usually go to school by bicycle but today I am going……………….……foot. 2. Is there a flower garden ……………….…… front of your house? - Yes, there is. 3. My mother wants a sandwich and a glass ……………….……orange juice. 4. What would you like……………….……dinner? - I’d like some noodles. 5. The plane flies……………….…….mountains, rivers and towns. 6. What are they doing at the moment? - They are listening……………….……the tape. 7. Elizabeth and Charls are ……………….……England. They speak English. Làm giúp mình nha! Hứa vote và cảm ơn đầy dủ

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cho hình chữ nhật ABCD; DG=GE; GH = HC. Diện tích hình tam giác EGH là 12,5 cm2 . Tính diện tích hình chữ nhật ABCD?

Tìm x trong dấu giá trị tuyệt đối |x|<2 |x|=-1 |x|=|-5| |x+3|=0