bhjij8ijo8

2 năm trước

Nhận biết buta-1,3-đien; propin và butan

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hoanguyen1234

2 năm trước

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Giải thích các bước giải:

- Cho dd AgNO3/NH3 lần lượt vào 3 chất trên

+ Xuất hiện kết tủa vàng là propin

PTHH: CH≡C-CH3 + AgNO3 + NH3 ---> CAg≡C-CH3↓vàng+ NH4NO3

+ Không có hiện tượng gì là buta-1,3-đien và butan

- Cho dd Br2 lần lượt vào 2 chất trên

+ dd Br2 nhạt màu là buta-1,3-đien, còn lại k có hiện tượng là butan

PTHH: CH2=CH-CH=CH2 + Br2 ---> CH2Br-CH=CH-CH2Br

Quỳnh Nguyễn

2 năm trước

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Nhận biết buta-1,3-đien; propin và butan

2 câu trả lời

if you don't wear a helmet , you can't ride your bike => Unless

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.

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Nhận biết buta-1,3-đien; propin và butan

2 câu trả lời

if you don't wear a helmet , you can't ride your bike => Unless

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.