Nguyễn Thị X. Hương

2 năm trước

Từ các chất sau CaO, Na2CO3 và H2O viết phương trình phản ứng điều chế dung dịch NaOH.

Xem đáp án

19 lượt xem

2 câu trả lời

Nguyen Duong

2 năm trước

CaO+H2O->Ca(OH)2

Ca(OH)2+Na2CO3->CaCO3+2NaOH

Minh Khuê

2 năm trước

Đáp án:

CaO+H2O-->Ca(OH)2
Ca(OH)2+Na2CO3-->CaCO3+2NaOH

Giải thích các bước giải:

CaO+H2O-->Ca(OH)2
Ca(OH)2+Na2CO3-->CaCO3+2NaOH

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Từ các chất sau CaO, Na2CO3 và H2O viết phương trình phản ứng điều chế dung dịch NaOH.

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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Từ các chất sau CaO, Na2CO3 và H2O viết phương trình phản ứng điều chế dung dịch NaOH.

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.