Có 4 lọ mất mất nhãn, đựng trong lọ riêng biệt là dung dịch không màu: HCl, H2SO4, KCl, K2SO4. Hãy nhận biết dung dịch đựng trong mỗi lọ bằng phương pháp hóa học. Viết các phương trình hóa học xảy ra. ( Nhớ là bằng phương pháp hoá học nha )

Giải giúp mình bài 123 tự luận với mình cần gấppp ạ

Anh chị giải giúp em bài hai ạ vẽ hình luôn nhé

helpppppppppppppppppppppppppppppp

Tính thể tích dung dịch NaOH 0,1M cần để trung hoá 200ml dung dịch HCl 0,2M

Tả về một người thân trong mùa dịch

1/3+1/6+1/12+1/20+1/30+...+1/9900 giúp mình với

Vẽ đậu mầm ( hoặc cái gì cũng được ) đang ngồi khóc, buồn NL : Buồn quá nick chính bị kick ra khỏi nhóm với lí do copy mặc dù không copy

(2x+7)2=9(x+2)2 2x+7 bình= 9(x+2) bình nha

XII. Write the correct tense or form of the verbs in brackets. 1. He _____________(receive) £300 when his uncle died. 2. The day we heard the news we _____________(have) holidays with our family. 3. Why ________________(you/ not answer) my phone call last night? ~ Oh, sorry,I _____________(take) a shower at that time. 4. She _____________(not see) her father since he _____________(start) to work inMarseille two years ago. 5. My mother ____________(fly) home from London today. Her flight _____________(arrive) in an hour. 6. We decided not to go because it _____________(rain) very hard. 7. When I ________(be) a child, my mother __________(read) me bedtime stories every night. 8. ________________(you/ ever/ hear) a Vietnamese folktale before? 9. The hare believed he would win the race, so he stopped _____________(take) a nap. 10. Once upon a time, there was a rich man _____________(live) in a village. XIII. Supply the correct form of the words in brackets. 1. Is The False Grandmother one of the ____________ versions of Little Red Riding Hood? (origin) 2. The king wanted to repay his servant’s ____________ in another way. (loyal) 3. The fox ____________ stole the egg by distracting the mother with a rock. (cunning) 4. The first thing that saved All Baba was his lack of ____________. (greedy) 5. Saint George is one of the most ____________ heroes in the western world. (legend) 6. The stepfather was a wicked man and treated his stepson very ____________. (cruelty) 7. Giving gifts to servants is an example of King’s ____________. (generous) 8. Princess Elsa ____________ magic that allows her to control and create ice and snow. (possession) 9. ____________, his parents passed away when he was 12 years old. (fortune) 10. The princess was so ____________ that she lost her ability to speak. (fright)