user-avatar
anhthuhqn
2 năm trước
Baì 4.Cho hợp chất có CTHH: P2X5 và YH3 a) Tìm hóa trị của nguyên tố X và nguyên tố Y trong mỗi chất. b) Viết CTHH của hợp chất tạo bởi 2 nguyên tố Y và X. Biết HC có PTK là 76 đvC và tỉ lệ nguyên tử khối Y và X là 7:8. Tìm CTHH đúng HC.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

CLAUSES Choose the best answer to complete these sentences. 1. _______ he likes chocolate, he tries not to eat it. A. As B .Though C. Since D. Despite 2. He is a very intelligent boy, _______he is very lazy A. but B. and C. or D. so 3. _______I moved house, I haven’t had much contact with those friends A. though B. since C. because of D. so that 4. Last night we came to the show late _______the traffic was terrible. A. although B. despite C. and D. because 5. Lan couldn’t pass the exam_______she was too lazy. A. because B. because of C. although D. in spite of 6. _______ his broken leg, he didn’t come to class yesterday. A. because B. because of C. despite D. so 7. _______there is a lot of noise in the city, I prefer living there. A. despite B. in spite of C. becacuse of D. though 8. _______ the weather, we went sailing. A. despite B. in spite of C. although D. A and B 9. _______Hudson led early, he lost the race. A. though B. although C. eventhough D. all are correct 10. In spite of not speaking French, Mike decided to settle in Paris. A. Eventhough Mike didn’t speak French, but he decided to settle in Paris. B. Mike decided to settle in Paris despite he didn’t speak French. C. Mike decided to settle in Paris though the fact that not speaking French. D. Although Mike didn’t speak French; he decided to settle in Paris.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team