Huỳnh Thái Minh Quân
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2024-10-31 20:17:08
2024-10-31 20:14:11
Gọi hóa trị của N là a, ta có:
- N2O: a.2 = II.1 ⇒ a = I
- NO: a.1 = II.1 ⇒ a = II
- NH3: a.1 = I.3 ⇒ a = III
- NO2: a.1 = II.2 ⇒ a = IV
- N2O5: a.2 = II.5 = a = V
2024-10-31 20:14:10
2024-10-31 20:14:04
2024-08-23 19:30:19
For example, we can pick up litter, plant more trees and setting up rubbish bin
2024-08-16 16:05:33
First, we usually have breakfast together every day, we usually have bread and noodles and share plans for the day. Second, we watch TV together every Saturday evening, we usually watch a film and exchange our opinions about the movie. Third, we visit our grandparents on the 2nd Sunday of the month to do housework and have lunch with them