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2 năm trước

Viết các PTHH theo dãy chuyển hóa sau a/ Cu ➜ CuO ➜ CuCl2 ➜ CuSO4 ➜ Cu(OH)2 ➜ CuO ➜ Cu ➜CuCl2 ➜ Cu(OH)2 b/ Al ➜ AlCl3 ➜ Al(OH)3 ➜ Al2O3 ➜ Al(NO3)3 ➜ Al

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Hạ Tử Nhiên

2 năm trước

Bạn tham khảo nhé

Quang Cường

2 năm trước

Cu+ 1/2O2 (t*)-> CuO

CuO+ 2HCl -> CuCl2+ H2O

Phương trình 3 ko tồn tại

CuSO4+ 2NaOH -> Cu(OH)2+ Na2SO4

Cu(OH)2 (t*)-> CuO+ H2O

CuO+ CO (t*)-> Cu+ CO2

Cu+ Cl2 (t*)-> CuCl2

CuCl2+ 2NaOH -> Cu(OH)2+ 2NaCl

Al+ 3/2Cl2 (t*)-> AlCl3

AlCl3+ 3NH3+ 3H2O -> Al(OH)3+ 3NaCl

2Al(OH)3 (t*)-> Al2O3+ 3H2O

Al2O3+ 6HNO3 -> 2Al(NO3)3+ 3H2O

2Al(NO3)3+ 3Mg -> 3Mg(NO3)2+ 2Al

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Viết các PTHH theo dãy chuyển hóa sau a/ Cu ➜ CuO ➜ CuCl2 ➜ CuSO4 ➜ Cu(OH)2 ➜ CuO ➜ Cu ➜CuCl2 ➜ Cu(OH)2 b/ Al ➜ AlCl3 ➜ Al(OH)3 ➜ Al2O3 ➜ Al(NO3)3 ➜ Al

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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Viết các PTHH theo dãy chuyển hóa sau a/ Cu ➜ CuO ➜ CuCl2 ➜ CuSO4 ➜ Cu(OH)2 ➜ CuO ➜ Cu ➜CuCl2 ➜ Cu(OH)2 b/ Al ➜ AlCl3 ➜ Al(OH)3 ➜ Al2O3 ➜ Al(NO3)3 ➜ Al

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.