Có 3 lọ mất nhãn đựng 3 chất khí không màu là : khí oxi, khí hidro và Khí cacbonic. Hãy nêu phương pháp nhận biết ba chất khí trên?

Các câu hỏi liên quan

X. Use the suggested words and phrases to write complete sentences. (10points) Dear Nam, 1. I / be / pleased / hear / that / you / your family / well. ………………………………………............................. 2. Here / photo / my family / and / let / me / tell / you / us. ……………………………………………............................. 3. Father / mechanic /. He / work / factory / suburb. ………………………………………............................. 4. He / work / five / days / a week / Monday / Friday. ……………………………………………............................. 5. He usually /go / work / motorbike / morning / so he / not free / every morning. …………………………………………………………….. 6. In free time / father/ often / play/ badminton / friends. ……………………………………………………………………………… 7. mother / teacher//. She / teach / Math / school / near / house. …………………………………………………………………………………… 8. Brother / 17 years/ and / he / grade 12. …………………………………………………………………………… 9. He / love / collect /stamps /. He / have / hundreds / stamps / collection. ……………………………………………………………………………… 10. please write / me soon / and tell / your / family. ………………………………………………………………………………