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sorry, mik ko phải A.R.M.Y, kb nhé.
sorry lần nữa, đọc nội quy chuyên mục.
kb nhá
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1 My parents go shopping twice a week
2 Hoa's house has a balcony
3 My brother usually plays badminton with his friends
4 My favorite book is Tam and Cam. What is yours?
5 There are 10 pencil cases on the table
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1.get up
2.set off
3.live on
4.deal with
5.closed down
6.come back
7.turned it down
8,look through
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1. I talk less comfortably than Tom.
I don't talk as comfortably as Tom.
I don't talk so comfortably as Tom.
3. She plays tennis better than we (do).
She doesn't play tennis as badly as we (do).
4. I suggest preserving this tradition.
I suggest that we should preserve this tradition
How about preserving this tradition.
5. Jack wondered whether or not he should make friends with that man then.
6. Due to the wonderful trip, we didn't want to finish.
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Câu 1.
Dùng dung dịch axit clohidric \(HCl\) vào hai chất trên:
+Thấy xuất hiện khí bay ra: kali cacbonat \(K_2CO_3\)
\(K_2CO_3+2HCl\rightarrow2KCl+H_2O+CO_2\uparrow\)
+Không hiện tượng: kali sunfat \(K_2SO_4\)
Câu 2.
a)\(Na_2O+H_2O\rightarrow2NaOH\)
b)\(Na_2O+H_2O\rightarrow2NaOH\)
\(6NaOH+Fe_2\left(SO_4\right)_3\rightarrow2Fe\left(OH\right)_3+3Na_2SO_4\)
Câu 3.
\(n_{NaOH}=\dfrac{20}{40}=0,5mol\)
\(n_{HNO_3}=\dfrac{20}{63}\approx0,3mol\)
\(NaOH+HNO_3\rightarrow NaNO_3+H_2O\)
0,5 0,3
\(\Rightarrow NaOHdư\) \(\Rightarrow\)Qùy hóa xanh.
MÌNH LÀ A.R.M.Y NÈ!
uk A.R.M.Y mấy năm rồi ạ.mk 2 năm rưỡi nha