Đây là câu trả lời đã được xác thực
Câu trả lời được xác thực chứa thông tin chính xác và đáng tin cậy, được xác nhận hoặc trả lời bởi các chuyên gia, giáo viên hàng đầu của chúng tôi.
$M_{CuSO_4.5H_2O}= 64+32+16.4+5(1.2+16)= 250 g/mol$
Đáp án:
Giải thích các bước giải:
KL mol của CuSO4.5H2O là M=64+32+64+5.(2+16)=250g/mol
Q1: Find the word with different stress 1 festival 2 cultural 3 traditional 4 local Q2: Find the word with different stress 1 horror 2 highlight 3 perform 4 seasonal Q3: The child always needs to ....... a helmet when riding with you. 1 wear 2 put 3 bring 4 pick Q4: It ............ me 15 minutes to walk home from the train station. 1 used to 2 spent 3 took 4 got Q5: Mai/use/cycle/school/when/she/grade 6/./ ......................................................................... Q6: You/must/obey/ traffic rules/ your safety/./ ........................................................................ Q7: they/use/go/beach/every summer/?/ ................................................................................. Q8: I enjoyed the film on TV yesterday morning. Nobody in my family liked it. (although) ................................................................... Q9: He suffers from physical handicap. He has become a successful businessman. ( in spite of) ......................................................................... Q10: The Flower Festival is celebrated every year. ( Make a question for the parts "every year") ..................................................................... Q11: We always have turkey on Thanksgiving. ( Make a question for the part "turkey"). ............................................................................... Q12: Peter went to Da Nang last month with his parents. ( Make a question for the parts " his parents") ............................................................................ Q13: People organize this festival to pray for better crops. ( Make a question for the parts " to pray for better crops") ............................................................................. Q14: Van had a motorbike once, but he doesn't any more. ( used) ................................................................................. Q15: Last night, I didn't go to bed early .......... being very tired. 1 despite of 2 in spite of 3 although 4 because Q16: Read the passage and answer the questions (16-1 -> 16-5) ................................................ Q16-1: What are Nick's favorite actors? ............................................................... Q16-2: Where does Daniel Craig come from? ....................................................... Q16-3: What kinds of films has he played? .................................................................................. Q16-4: What was Halle Berry's job before she became an actress? .......................................................................... Q16-5: What Halle Berry's film does Nick like best? ...................................................................
Qua hai văn bản :"chiếc lược ngà " và "làng" dã học cho em biết tên tác giả , tác phẩm ý nghĩa nhan đề văn bản , tình huống truyện , nôi dung chính về nghệ thuật tiêu biểu của hai tác phẩm
Tìm x thuộc z biết :(x-1)+(x-2)+...+(x-100)=99x-6050
neu nhung chien thang tieu bieu qua cac thoi ki , Nha Ly , Nha Tran va thoi Le So theo yeu cau sau: thoi gian, lanh dao, y nghia
It only takes me about 40 minutes to get to work now that the new roadis open. It ( take) more than an hour
GTNN của M= |x-2|+|x-20| +|x-38|
so sánh (2020 -2019)/(2020+2019) và (2020^2 - 2019^2)/(2020^2 + 2019^2)
$\left \{ {{x + y = 1} \atop {m²x - 2y = 7}} \right.$ Chứng minh hpt luôn có 1 nghiệm duy nhất với mọi giá trị của m
1. Helen: “Where do you come from?” ~ Ann “________.” A. I come from London B. In London C. Yes, I’ve just come here D. I’m living in London 2. He ________in the cafe when she came. A. sat B. has sat C. has been sitting D. was sitting 3. Mr. Dung will be leaving ________Son La on Sunday. A. in B. at C. from D. for 4. “Pass me that pen, please!” ~ “________”. A. Here you are B. No, it isn’t C. Yes, please D. It doesn’t matter 5. Where is Huong? - She’s out. She said she ________back soon. A. is B. was C. came D. would be 6. Thang has applied for a ________in a new company. A. career B. work C. job D. task 7. ________you let me take a photograph of you? A. Will B. Shall C. May D. Must 8. All of us were ________that he came first. He hasn’t been working hard so far. A. surprising B. to surprise C. surprised D. to be surprised 9. I telephoned the station to make ________of the time of the train. A. sure B. true C. real D. right 10. My brother loves ________to music very much. A. to be listened B. listening C. to listen D. listened 11. He ________his grandparents every Sunday. A. has visited B. visits C. is visiting D. was visiting 12. The policeman explained to us ________to get to the airport. A. how B. how can we C. how can D. how we can 13. Several people were hurt in the accident but only one ________to hospital. A. was taken B. was taking C. has taken D. has been taking 14. He ________in London at the moment. A. studies B. is studying C. has studied D. will study 15. The college got some money by selling one of its ________old pictures. A. useful B. usual C. valuable D. helpful Giair thích giúp mình với nha
(1-1/2)(1-1/3)(1-1/4)... (1-1/99) Giải giùm em nha. Em vote 5 sao cho.
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến