a/ Cho 6,5g kẽm tác dụng hết với axit Clohidric HCI. Tính thể tích khí hiđro sinh ra ở đktc? b/ Nếu dùng thể tích khí hiđro này để khử 1.6 sắt (III) trong oxit Fe2O3. Tính khối lượng sắt (III) oxit cần đem phản ứng. giải hộ mik vs

IV. Rewrite the sentences so that they are nearest in meaning to the sentence printed before them. 26 People spent more time communicating with each other in the past. It took 27 He used to write letters to keep in touch with her when he lived far from her. Letters used to 28 How long has that phone been used by our teacher? When 29 How about going on a picnic this weekend? Why don't we 30 "Let's watch a comedy" he said. He suggested V. Choose the correct sentence from the four options a, b, c or d 31 I/ make/ friends/ foreigner/ in/ chat room. a. I made friends with a foreigner in a chat room. b. I am making friends with foreigner in a chat room. c. I was made friends with a foreigner in a chat room. d. I have made friends with foreigner in a chat room. 32 Cultural differences/ can/ seen/ in/ conversation/ between/ people/ different countries. a. Cultural differences can seen in conversation between people to different countries. b. Cultural differences can seen in conversation between people on different countries. c. Cultural differences can be seen in conversation between people from different countries. d. Cultural differences can be seen in conversation between people for different countries. 33 Learn/ English/ help/ us/ get over/ the/ language barriers a. Learn English helps us get over the language barriers. b. Learning English helps us get over the language barriers. c. To Learn English helps us get over the language barriers. d. Learnt English helps us get over the language barriers 34 Have/ you/ ever/ attend/ video conference a. Have you ever attended a video conference? b. Have you ever attending a video conference? c. Have you ever attend a video conference? d. Have you ever attends a video conference? 35 Thanks/ social networks, we/ can/ connect/ each other/ easily. a. Thanks social networks, we can connect to each other easily. b. Thanks social networks, we can to connect to each other easily. c. Thanks to social networks, we can to connect to each other easily. d. Thanks to social networks, we can connect to each other easily 36 My/ cellphone/ parents/ me/ buy/ promised/ a/ to/ I’m/ when/ 18 a. My parents promised to buy me a cellphone when I’m 18 b. My parents promised buy to me a cellphone when I’m 18 c. My parents promised when to buy me a cellphone I’m 18 d. My parents promised to buy a cellphone me when I’m 18 37 My/ landline/ to/ grandfather/ smart phones/ prefers. a. My grandfather prefers to landlines smart phones. b. My grandfather to prefers landlines smart phones. c. My grandfather prefers landlines to smart phones. d. My grandfather prefers smart landlines to phones. 38 Non-verbal/ called/ languages/ are/ languages/ sometimes/ body. a. Non-verbal languages are sometimes called body languages. b. Non-verbal languages are called sometimes body languages. c. Non-verbal are languages sometimes called body languages. d. Non-verbal are languages called sometimes body languages. 39 If/ I/ someone/ send/ will/ her/ I/ a/ love/ send/ snail mail. a. If I send someone, I will love her a snail mail. b. If I send her, I will love someone a snail mail. c. If I love her, I will send someone a snail mail. d. If I love someone, I will send her a snail mail. 40 People/ have/ telepathy/ believe/ twins/ that/ often. a. People have that twins often believe telepathy. b. People believe that twins often have telepathy. c. People twins believe that often have telepathy. d. People believe twins often that have telepathy

Quá trình lên men glucozơ để sản xuất rượu etylic được biểu diễn theo phương trinh hóa học sau: C6H12O6→2C2H5OH+2CO2. Nếu lên men 2160 gam glucozơ thì thể tích khí CO2 ở đktc thải ra môi trường là bao nhiêu ?

write about The First University in Viet Nam

Cảm nhận vẻ đẹp của nhân vật anh thanh niên trong đoạn trích trên (khoảng 3 đến 5 câu). Trong phần trình bày, có thành phần cảm thán. Gạch chân hoặc viết lại thành phần cảm thán đó, mn giúp mình bài này với

30 điểm lận á mọi người làm cho mik đi năn nỉ luôn á

Bài 3. Một người đi xe đạp với vận tốc v1 = 8km/h và một người đi bộ với vận tốc v2 = 4km/h khởi hành cùng một lúc ở cùng một nơi và chuyến động ngược chiều nhau. Sau khi đi được 30phút, người đi xe đạp dừng lại, nghỉ 30phút rồi quay trở lại đuổi theo người đi bộ với vận tốc như cũ. Hỏi kế từ lúc khởi hành sau bao lâu người đi xe đạp đuổi kip người đi bộ? Giúp e vs em cốt 5 sao. Lm bài3 thôi nhé

Vẽ oc của bạn và một loại hoa quả tùy chọn :> Full màu Không vẽ qua loa.

I. Choose the word whose main stress pattern is not the same as that of the others. 1 a. quality b. additive c. decisive d. battery 2 a. repetitive b. electrical c. priority d. energetic 3 a. transitive b. impressive c. exciting d. connection 4 a. holography b. inexpensive c. infinitive d. complexity 5 a. conversational b. oversensitive c. communicative d. personality II. Choose the word or phrase (a, b, c or d) that best fits the blank space in each sentence. 6 I prefer face-to-face conversation __________ video call. a. to b. on c. of d. with 7 There is no school teaching netiquette __________ we should learn it. a. or b. so c. but d. because 8 We should learn it_______________________there is no school teaching netiquette a. or b. so c. but d. because 9 With multimedia, we can have __________ to the latest news in the world a. access b. message c. language d. landline 10 Have you ever talk with stranger in a chat __________? a. house b. room c. area d. neighbor 11 You shouldn’t believe in things in the __________ world a. real b. cultural c. body d. cyber 12 Communication __________ occurs when two people don’t understand what each other is talking about. a. break out b. break down c. break in d. break off 13 Could you tell me how many __________ channels are there in daily life? a. communication b. world c. conference d. difference 14 They hold video __________ when the attendees are far away from each other. a. room b. media c. conference d. board 15 I tried __________ her by phone but the line was busy a. reach b. to reach c. reaching d. reached 16 Could you name some language __________ when talking to a people from different culture? a. messages b. barriers c. texts d. mails 17 Today there are many different ways to communicate ________, including social networking, chat, VoIP and blogging. a. verbal b. telepathy c. social d. online 18 Less people write _________ mails now than 20 years ago. a. snail b. social c. nonverbal d. body 19 Although having some cultural _________, we got on quite well. a. barriers b. languages c. differences d. medias 20 Social network _________ both advantages and disadvantages. a. has b. gets c. comes d. plays III. Choose the underlined word or phrase (A, B, C or D) that needs correcting. 21 I (A)will chat with my friend (B)in New York (C)on Skype at this time (D)next Saturday. a. will chat b. in New York c. on Skype d. next Saturday 22 Peter refused (A)working Online (B)because he (C)prefers meeting (D)face-to-face. a. working b. because c. prefers d. face-to-face 23 We (A)are still using (B)landline phones to (C)communicate with (D)each other in 10 years. a. are still b. landline phones c. communicate with d. each other 24 (A)She denied (B)sign up for (C)another account (D)to post comments on my Facebook wall. a. She b. sign up c. another account d. to post 25 (A)Members of the project (B)is going to have a F2F (C)group discussion in five days’ (D)time last Sunday . a. Members b. is going to have c. group discussion d. time

Giải bài toán sau bằng cách lập phương trình: Theo kế hoạch, mỗi ngày phân xưởng phải may 50 chiếc áo. Nhưng do cải tiến máy móc, nên mỗi ngày phân xưởng đã may được 56 chiếc áo. Vì vậy, không những phân xưởng hoàn thành trước kế hoạch 3 ngày mà còn may thêm được 120 chiếc áo. Tính số chiếc áo phân xưởng phải may theo kế hoạch.