Everybody is singing the song ………joyfully…………………………(JOY) 

Trinh Cong Son is one of the most famous _musicians__________ in Vietnam. (MUSIC)

That’s great news. Give her my …………congratulation…………………. (CONGRATULATE)

III/ fill in each with one suitable word

I think it is (1) desirable for students to wear uniforms when they are (2) at school

Fristly, uniforms encourage students to be proud (3) of being students of the school they are going to because they are wearing the uniforms with (4) labels bearing their school's (5) name.

Secondly, wearing uniforms help students feel equal in many ways. Everyone starts from the same place, whether they are rich or (6) poor . They're really friendly to one (7) another under one school roof.

Finally, wearing uniforms is practical. You don't have to think of what to wear every day

Therefore, all students, from primary to (8) high school should wear uniforms

1. She was really (impress).....impressed.....by the beaty of the city

2. She made a deep (impress).......impression..... on the members of the her class

3. He is very poor, so he has to live (depend)......dependently...... On his parents

4. He is very rich, so he can live (depend)......independently.....

5. Trinh Cong Son was a fine (music)......musician........ . He composed a lot of beatiful songs

6. I have just received an (invite).....invitation..... card from my friend

7. What is the main language of (instruct)......instruction....... at that school?

8. Flowers (symbol).....symbolize...... love

9. Many (design).......designers....... took (inspire)......inspiration......from VietNam's ethic minorities

1, Thank you for the alarm clock you sent me on my 15th birthday

2, It's just what I need 

3, I'm terrible to get up late in the moring and I'm almost always late for school 

4, Thank you four your gift 

5, I can get up early and I will never go to school late

6, I hope you and your parents are well 

7, I'm looking forward to seeong you at Christmas 

8, Thanks also your lovely card

what do they eat for lunch?

what does he often do every evening?

III/ give the correct form of the words in brackets

1. These lines of (poem)..poet.........are difficult to understand

2. Vietnam's ethnic minorities are a great source of (inspire) ...........inspiration....to many writers

3. She often wears a long- (sleeve)....sleeved.......white blouse to work

4. The (announce)...announcement.........of her marriage appeared in some local newspapers

5. That boy could pass the final exam thanks to his father's (encourage)......encouragement......

6. Thanks a lot for your (encourage)encouraging words. Now i feel much better

7. I am afraid that you plan is not (practice).practicable........

8. It is (need)....neccessary......for (second).......secondary.....school students to wear uniforms

9. Our (economy).....economical.........situation is becoming worse than ever before

10. You have no (choose).....choice.......... You must leave the party right now

11. My sister always dresses (fashion)..fashionably........... When going out

12. The visiting team scored one more goal in the (add)....additional.......time

 You must wear sun scream when you're on Ly Son island

- You must go to Ly Son Island in the early morning or late afternoon

- You mustn't litter on the island

-  You mustn't swim alone. You must wear sun scream when you're on my son's island

- You must go to the Sam Son beach in the early morning or late afternoon

- You mustn't litter on the island

-  You mustn't swim alone.

chucbanhoctot

#tranhuyentuanh

PTHH: \(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

Ta có: \(\left\{{}\begin{matrix}m_{H_2SO_4}=588\cdot5\%=29,4\left(g\right)\Rightarrow n_{H_2SO_4}=\dfrac{29,4}{98}=0,3\left(mol\right)\\n_{Al_2O_3}=\dfrac{20,4}{102}=0,2\left(mol\right)\end{matrix}\right.\)

Xét tỉ lệ: \(\dfrac{0,2}{1}>\dfrac{0,3}{3}\) \(\Rightarrow\) Al₂O₃ còn dư

\(\Rightarrow n_{Al_2\left(SO_4\right)_3}=0,1\left(mol\right)=n_{Al_2O_3\left(dư\right)}\)

\(\Rightarrow C\%_{Al_2\left(SO_4\right)_3}=\dfrac{0,1\cdot342}{20,4+588-0,1\cdot102}\cdot100\%\approx5,72\%\)