HOC24
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Hóa cũng có tóm tắt á :))
Câu b) thì tớ tạm chưa hiểu :vv
a) PTHH: \(4Fe+3O_2\underrightarrow{t^o}2Fe_2O_3\)
Ta có: \(n_{Fe}=\dfrac{m}{M}=\dfrac{16,8}{56}=0,3\left(mol\right)\)
PTPƯ: 4Fe + 3O2 \(\underrightarrow{t^o}\) 2Fe2O3
4 3 2
0,3 0,225 0,15
\(\Rightarrow V_{O_2}=n.24,79=0,225.24,79=5,57775\left(l\right)\)
VII. Hoàn thành câu với từ gợi ý
1,They/take/vegatable/market/the moment
-> They are taking vegetable in the market at the moment.
2,You/drive/work/or/go/bus
-> You drive to work or go by bus.
3,There/be/small park/front/Linh/house
->.. There is a small park in front of Linh's house.
4,Our apartment/have/four rooms/and/seventh floor
-> Our apartment has four rooms and on the seventh floor.
5,Brother/live/Paris/and have/bakery/there
-> Brother lives in Paris and has a bakery ther.
2. Reorder the words to make meaningful sentence
1. his / Pelé / the / began / of 15 / carrer / at / age.
=> Pelé began the career hisat age of 15.
2. in / a / there / how / match / are / many / footbal / players?
=> How many players are there in a football match
3. favourite / is / progamme / my / "Tom and Jerry".
=> My favourite programme is "Tom and Jerry.
4. national / VTV1 / a / is / channel / in Vietnam.
=> VTV1 is a channel national in Vietnam.
Sao cậu biết không trả lời hết được cơ? Đăng 10 đến 20 câu chứ đăng 100 câu 1 lượt thì chả không có ai làm cho :v
tìm và sửa lỗi sai
The students is => are in the classroom
Tại sao nhất thiết là từng câu?