14: B 

15: A

Câu 14: B

Câu 15: A

Câu 13: B

Câu 14: D

Câu 15;B

12.4/15

13.B

14.D

15.B

từ câu 10 đến câu 15 nhé

15) KH₂PO₄: Kali đihidrophotphat \(\rightarrow\) Muối axit 

16) NaNO₂: Natri nitrơ \(\rightarrow\) Muối trung hòa

17) LiI: Liti iotua \(\rightarrow\) Muối trung hòa

18) KClO₃: Kali clorat \(\rightarrow\) Muối trung hòa

ai xóa ctl của mình vậy?

Tham khảo:)

1. My father used to live in small village when he was a girl.
2. There did not use to vehicles on the road before.
3. We used to cycle to school two years ago.
4. Now there are many traffic accidents.
5. My brother used to go swimming when he was a child.

6. I didn’t go to school because I was sick.  ->I was sick, so I didn’t go to school.

7. It will be good if you eat less meat and more vegetables.

-> You should eat less meat and more vegetables

8. He likes playing computer games in his free time.à His hobby is playing computer games

9. I am interested in watching TV in the evening.à I enjoy watching TV in the evening

10. I think that learning English is important.à I find learning English important

11.My brother enjoys coffee very much. -> Coffee is my brother’s favorite drink.

12.What is the price of a plate of fried rice? -> How much is a plate…hoặc.. does a plate … cost?

13. This food has some meat and tofu. -> There is some meat and tofu in this food.

14. Chicken is my sister’s favorite food. (likes) ->My sister likes chicken very much.

15. There is sugar in many kinds of food. (have) -> Many kinds of food have sugar.

14. C

15. C

16. C

17. B

cảm ơn nha 

thêm câu 14

ta có BTKLg :

m mg +m _Cl2=m _MgCl2

=>m _Cl2=47,5-12=35,5g

15

4Al+3O₂-to>2Al₂O₃

0,2--0,15  mnol

n _Al=\(\dfrac{5,4}{27}\)=0,2 mol

=>V_O2=0,15.22,4=3,36l

Câu 15: 

a: Xét ΔBAD vuông tại A và ΔBED vuông tại E có

BD chung

\(\widehat{ABD}=\widehat{EBD}\)

Do đó: ΔBAD=ΔBED

Suy ra: DA=DE

b: Xét ΔADF vuông tại A và ΔEDC vuông tại E có

DA=DE

\(\widehat{ADF}=\widehat{EDC}\)

DO đó: ΔADF=ΔEDC

Suy ra: DF=DC

c: Ta có: ΔBFC cân tại B

mà BD là phân giác

nên BD là đường cao