tiendungthitran

2 năm trước

Cho SO, SO2, SO3, S2O4 công thức hoá học của oxit nào có thành phần % về khối lượng của S là 40% ?

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Quỳnh Nguyễn

2 năm trước

Mình trình bày chi tiết ở trong hình!

Nguyen Duong

2 năm trước

Đáp án:

SO3

Giải thích các bước giải:

SO: M=48

->%mS=32/48=66,67%

SO2: M=64

->%mS=32/64=50%

SO3: M=80

->%mS=32/80=40%

S2O4: M=128

->%mS=32.2/128=50%

Vậy chất thỏa mãn là SO3

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2 câu trả lời

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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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Cho SO, SO2, SO3, S2O4 công thức hoá học của oxit nào có thành phần % về khối lượng của S là 40% ?

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.