trần thị diệu linh

Ahihi rớt rồi =))

- Đều nói lên tâm trạng của 2 tác giả khi ở trong tù

- Sự tương phản giữa cuộc sống tự do và cuộc sống tù đày

Tự dưng cũng muốn làm CTV :(( Nhưng lại lười :((

1. Early this morning/ children/ decide/ go/ a run.
--> Early in this morning,the children decided to go for a run.

2 .life/country/definitely/changing/the better

-->Life in the country has been definitely changing better.
3. the date/meeting/will/have to/change/tomorrow.

-->The date of the meeting will have to be changed tomorrow
4.Tom/have/shower/telephone/rằng (rang not rằng)

-->Tom was having shower when the telephone rang.

5..last year/we/spend/week/My Son/and/I not want/leave

-->Last year,we spent a week in My Son and I didn't want to leave

6.watching/television/consider/most/popular/kind/entertainment/nowadays

-->Watching televison is considered the most popular kind of entertainment nowadays

7.after/many/experiments/finally/fist/successful/flight/make/by/Wright brothers.

-->After many experiments finally the first successful flight was made by Wriht brothers

\(n_{O_2}=\frac{6,72}{32}=0,21\left(mol\right)\)

\(2KClO_3\rightarrow2KCl+3O_2\)

Theo pt 2mol......2mol....3mol

Theo đề 0,14mol....0,14mol....0,21mol

\(m_{KClO_3}=0,14\cdot\left(39+35.5+48\right)=17,15\left(g\right)\)

Do phân tử khối của khí Oxi lớn hơn không khí.

Video ẩn danh hay gì bác? :v
_{p/s: nếu cmt này bị spam thì cứ xóa ạ}

Trong tam giác vuông ABC có :

\(BC^2=AB^2+AC^2\left(Pytago\right)\\ \Rightarrow AC^2=BC^2-AB^2=5^2-3^2=25-9=16\left(cm\right)\\ \Rightarrow AC=\sqrt{16}=4\left(cm\right)\)

Do đó: \(S_{ABC=}=\frac{AB\cdot AC}{2}=\frac{3\cdot4}{2}=6\left(cm^2\right)\)

1) \(2Fe+3Cl_2\rightarrow2FeCl_3\)

2) \(n_{Fe}=\frac{m}{M}=\frac{3,36}{56}=0,06\left(mol\right)\)

\(2Fe+3Cl_2\rightarrow2FeCl_3\)

Theo pt 2 mol ....3 mol...2 mol

Theo đề 0,06 mol...0,09 mol... 0,06mol

\(V_{Cl_2}=n\cdot22,4=0,09\cdot22,4=2,016\left(l\right)\)

3) Theo câu 2 ta có

\(n_{FeCl_2}=0,06\left(mol\right)\)

\(\Rightarrow m_{FeCl_3}=n\cdot M=0,06\cdot\left(56+35.5\cdot3\right)=9,75\left(g\right)\)

bai 1

Begin

writeln('2-3*3+6*6=',2-3*3+6*6);

writeln('(1/2)+3*3=',(1/2)+3*3);

Readln;

End.

Bai 2

Program bai2;

Var a,b,c,SV,SHCN:real;

Begin

writeln('canh hinh vuong la'); read(c);

SV:=c*c;

Writeln('Dien tich hinh vuong la',SV);

writeln(' chieu rong hinh chu nhat la'); Read(a);

writeln('chieu dai hinh chu nhat la'); read(b);

SHCN:=a*b;

writeln('dien tich hinh chu nhat la',SHCN);

readln

End.