$a) Cl$ Hóa trị $(I)$
$•K$ hoá trị $I$
$→KCl$
$•Ba$ hóa trị $II$
$→BaCl_2$
$•Al$ hóa trị $III$
$→AlCl_3$
$b) SO_4$ hóa trị $(II)$
$•K→K_2SO_4$
$•Ba→BaSO_4$
$•Al→Al_2(SO_4)_3$
Đáp án:
Giải thích các bước giải:
kể một câu chuyện về chủ đề :hãy để cho tuổi thơ có một mái ấm gia đình
a. Có một hòn đá không bỏ lọt bình chia độ ta phải làm thế nào để xác định được thể tích của hòn đá? Hãy mô tả cách xác định đó b. Trên nhãn hộp sữa ông Thọ có ghi 397g số đó cho biết điều gì?
vẽ chữ Lemon ra giấy đẹp vô nhos~~ko vẽ app
Em hãy hóa thân thành rùa vàng kể lại câu chuyện An Dương Vương ,mị châu và trọng thủy
Rewrite the following sentences, using the cues given: 1.My parents don't allow me to go out at night. My parents don't let 2.A man broke into Mrs. Brown's house. Daisy saw 3.She bought herself a new motorbike then she sold her bicycle. After .... 4.The robber came from the back door. I could feel 5 The little boy blew out all of the candles on the birthday cake. We saw the little boy 6 She didn't want to stay there for the weekend. They made her.. 7. He left the house early this morning.> I saw. 8 They offered us a delicious meal. It was very hospitable.-> It was. 9. My mother allowed me to have a trip to my hometown.-> My mother let. 10. would you like to check in ?>>> do you mind. WORD FORM 1. One of the qualities for true (friend).. his (selfish).... I felt very (embarrass).. 4. She was in a very(embarrass). 5. I have just received an (invite).. 6. The 50th wedding anniversary is called the (gold).. aniversary 7. The birthday cake was( beauty) 8 he feel the 9 There can be no ( suspicious) between them. 10 We are (easy) influences by rumours. .is unselfishnish 2. separated her from her classmates. 3. situation. ...to the party. .decorated with pink and white icing ...( attract) of some new object.
33. Do you kepe to Lan's bixthday pOrty z. .... D. being invited B. do C. doing C. inviting D. done A. to be invited 33 It is impossible... 34. The water was so polluted that the explorers could not drink it. A. The water was too polluted for the explorers to drink B. The water was polluted enough for the explorers to drink C. The water was too polluted for the explorers drinking D. The water was polluted enough for the explorers drinking 35. Does Dr. Johnson mind.. A. to call 36We heard a baby 37. I'd rather B. to invite ..such a difficult thing without any help. A. to do ...at home if his patients need his help? D. being called B. to cry B. to be called C. calling in a neighbouring village. A. cry to Elvis than the Beatles. B. to listen C. cried D. to crying C. listening D. listened A. listen 38He managed climb/ being seen 39. People call the 25th the" A. golden 40.John into the kitchen without A. to climb/ seeing B. climbing/ being seenC. to D. to be climbed/ seeing anniversary" B. silver C. diamond D. bronze his first piece of music when he was ten years old. C. written D. wrote B. writes A. was writing 41. We are whispering to avoid A. hearing 42.The plants want. 43."Did anyone see the thief ?" “No, he already . .. away by the time we . .. in ". A. ran / had come B. runs/have come 44. I... .a car accident while I .........for you on this corner yesterday. A. saw/was waiting B. see/am waiting 45. I remember...next door to you when we were in Australia.A. to live IV. Choose the underlined part among A,B,C or D that needs correcting 46. She began play the guitar when she was six. 47. The girl was very embarrassing when she realized that the money was not hers. 48. Don't make so much fusses over the children. by the other ones. C. to be heard D. being heard B. being hearing D. being water ....daily.A. to water B. watering C. to be watered C. has run / come D. had run / came C. saw/waited D. see/wait D. have lived B. livingC. live uing cantences, using the cues given: I.Chon từ (ing 1: A. spe 2:
Con người phố huyện lúc chiều tà hiện lên như thế nào Qua bài những đứa trẻ
Hãy kể tên cuộc cách mạng tư sản đầu tiên ở Châu Mĩ?
Giúp em bài này với mng ưiii =((
tìm hai chữ số x và y đều nhau sao cho 7,x8<7,481<7,y
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