Đáp án: Chất tác dụng với hcl và co2 A sắt B nhôm C kẽm D dd naoh - HCl + NaOH → NaCl + H2O NaOH + CO2 → NaHCO3 hoặc 2NaOH + CO2 → Na2CO3 + H2O => Ta chọn câu d Dung dịch Noah

(Đáp án) (D) (Giải thích các bước giải) (NaOH+HCl -> NaCl+H_(2)0 ) (#Kakashi hatake) (Chúc bạn học tốt)

Mây Nguyễn

1 tháng trước

Chất tác dụng với hcl và co2 A sắt B nhôm C kẽm D dd naoh

Xem đáp án

9 lượt xem

2 câu trả lời

Lê Nguyễn Mây Vàng

1 tháng trước

HCl + NaOH → NaCl + H2O NaOH + CO2 → NaHCO3 hoặc 2NaOH + CO2 → Na2CO3 + H2O => Ta chọn câu d. Dung dịch Noah

nguyensyannamDH7qC

1 tháng trước

$\text{Đáp án:}$

$\text{D}$

$\text{Giải thích các bước giải:}$

$\text{NaOH+HCl -> NaCl+$H_{2}$0 }$

$\textit{#Kakashi hatake}$

$\textit{Chúc bạn học tốt}$

Đăng nhập để trả lời

Câu hỏi trong lớp Xem thêm

V. Read the text then choose the best options to complete the statements. (1.0pt) Yesterday, on the way home from school, I saw an accident. A boy was run over by a taxi when he was riding his bicycle. The boy's leg was broken and it was bleeding badly. Someone there tried to stop the bleeding. They put pressure on it and held it tight. A man used his mobile phone to call the emergency service. Some minutes later, an ambulance arrived and sent the boy to the hospital. Two policemen came to the scene immediately. Some people told the police that the taxi was driving at a very high speed when the accident happened. Some others began talking about the traffic accidents these days andblamed the increasing number of accidents on the roads for careless driving and drunk drivers. 1. What did the writer see yesterday? A. a fire B. an accident C. a fighting D. a crash 2. The boy was sent to the hospital by. A. a police 3. What partof his body was hurt?- His. B. a car C. an ambulance D. a taxi A. arm B. leg C. head D. shoulder 4. How was the driver driving when the accident happened?- Very.. A. slowly C. carefully B.well D. fast

2 lượt xem

2 đáp án

21 giờ trước

Nước ta có bao nhiêu dân tộc?

1 lượt xem

2 đáp án

21 giờ trước

Exercise 2: Giovanni lives in Italy and plans to visit England. Make all the changes and additions necessary to produce, from the following eight sets of words and phrases, eight sentences which together make the letter Giovanni wishes to send to the college where he hopes to study English. Dear Mr. Johnson, 1. A friend/mine/recently/return/England/advise me/write/you. 2. I/hope/come/England/next year/spend/some months/Cambridge. 3. Perhaps/recommend/suitable English family/me stay. 4. While/I/there/take/part – time course/improve/my English. 5. Be/part – time course/your college? 6. If/be/I/be/grateful/you send/application form. 7. Please/tell/much/fees/course/be. 8. I/like/know/date/course/begin. Your sincerely Giovanni Bianchi

2 lượt xem

1 đáp án

21 giờ trước

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

3 lượt xem

2 đáp án

21 giờ trước

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

326

326 lượt xem

1 đáp án

1 năm trước

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

239

239 lượt xem

1 đáp án

1 năm trước

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

237

237 lượt xem

1 đáp án

1 năm trước

Chất tác dụng với hcl và co2 A sắt B nhôm C kẽm D dd naoh

2 câu trả lời

Nước ta có bao nhiêu dân tộc?

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Chúng tôi

Học tốt

Liên kết

Mạng xã hội

Chất tác dụng với hcl và co2 A sắt B nhôm C kẽm D dd naoh

2 câu trả lời

Nước ta có bao nhiêu dân tộc?

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.