Tỉ lệ 20%, 80% là tỷ lệ về thể tích.

Mà thể tích tỉ lệ thuận với số mol nên có thể tính:

Trong 1 mol khí thì:

\(n_{O_2}=1\cdot20\%=0,2mol\\ n_{N_2}=1\cdot80\%=0,8mol\)

Trong 1 L khí thì tương tự. Đây chỉ là tỷ lệ của một chất trong hỗn hợp nên không dùng đến công thức V/24.79.

Chuyển sang gì đấy bạn?

John is  more  intelligent  than everyone in this class

viết lại câu

1/ No one in my class is more intelligent than Lan. → Lan is THE MOST INTELLIGENT IN MY CLASS.

2/ We don't know a happier person than him. → He is HAPPIEST PERSON WE KNOW.

3/ Nothing is more interesting than football. → Football is THE MOST INTERESTING.

4/ Is this the biggest hat you've got ? → Have you got ANY HAT BIGGER ?

5/ Everest is higher than any mountains in the world. → Everest is THE HIGHEST MOUNTAINS IN THE WORLD.

6/ No one in my class is fatter than Minh. → Minh is THE FATTEST IN MY CLASS.

7/ Mr Ron is the richest man in our town. → No one IN OUR TOWN IS RICHER THAN MR. RON.

8/ No one in my group is better at English than Lan. → Lan is THE BEST AT ENGLISH IN MY GROUP.

1/ No one in my class is more intelligent than Lan.

→ Lan is the most intelligent in my class.

2/ We don't know a happier person than him.

→ He is the happiest person.

3/ Nothing is more interesting than football.

→ Football is the most interesting.

5/ Everest is higher than any mountains in the world.

→ Everest is the most mountain in the world.

6/ No one in my class is fatter than Minh.

→ Minh is the fattest in my class.

7/ Mr Ron is the richest man in our town.

→ No one in our town richer than Mr Ron.

8/ No one in my group is better at English than Lan.

→ Lan is the best at English in my group.

1/ Lan is the most intelligent (student) in my class .

2/ He is the happiest person .

3/ Football is the most interesting (sport) .

4/ Have you got a bigger hat than this (one) ?

5/ Everest is the highest mountain in the world .

6/ Minh is the fattest (student) in my class .

7/ No one in our town is richer than Mr. Ron .

8/ Lan is the best (student) at English in my group .

 1. I’ve never met any more handsome person than Gind.

=> Gind is the most handsome person I have met

2. In my opinion, there is nobody as kind-hearted as my grandmother.

=> In my opinion, my grandmother is the most kind-hearted person

3. There is no more intelligent student in this school than John.

=> John is the most intelligent student in this school

 This is the most delicious dish I’ve ever tasted.

=> I’ve never tasted such a delicious dish 

5. Have you got any bags smaller than that one?

=> Is this the smallest bag you have got                              ?

6. No river in the world is longer than the Nile.

-> The Nile is the longest river in the world

7. Mount Everest is the highest mountain in the world.

-> No mountain in the world is as high as Mount Everest 

8. This is the first time I have ever met such a pretty girl.

-> She is the prettiest girl I have ever met

9.This computer works better than that one.

-> That computer doesn't work as well as this one

10. No one in my class is taller than Peter.

-> Peter is the tallest person in my class

 1. I’ve never met any more handsome person than Gind.

=> Gind is  the most handsome person I have ever met.

2. In my opinion, there is nobody as kind-hearted as my grandmother.

=> In my opinion, my grandmother is the most kind-hearted.

3. There is no more intelligent student in this school than John.

=> John is the most intelligent student in this school.

 This is the most delicious dish I’ve ever tasted.

=> I’ve never tasted a more delicious dish than this.

5. Have you got any bags smaller than that one?

=> Is this   the smallest bag you have   ?

6. No river in the world is longer than the Nile.

-> The Nile is the longest river in the world.

7. Mount Everest is the highest mountain in the world.

-> No mountain  is as high as Mount Everest in the world.

8. This is the first time I have ever met such a pretty girl.

-> She is the prettiest girl I have ever met.

9.This computer works better than that one.

-> That computer doesn't work as well as this one.

10. No one in my class is taller than Peter.

-> Peter is the tallest in my class.

Gind is the most handsome person I have met

In my opinion, my grandmother is the most kind-hearted person

John is the most intelligent student in this school

I’ve never tasted such a delicious dish 

Is this the smallest bag you have got?

The Nile is the longest river in the world

No mountain in the world is higher than Mount Everest

She is the prettiest girl that I have ever met

That computer works worse than this one

Peter is the tallest person in my class

1 Gind is the most handsome person I have ever met.
2 In my opinion, my grandmother is the most kind-hearted
3 John is the most intelligent student in this school.
4 I’ve never tasted a more delicious dish than this
5  Is this   the smallest bag you have
6 The Nile is the longest river in the world.
7 No mountain  is as high as Mount Everest in the world
8 She is the prettiest girl I have ever met.
9 That computer doesn't work as well as this one.
10 Peter is the tallest in my class.
 

exercise 5: viết lại câu 

1) No one in my class is more intelligent than Lan.

= Lan is the most intelligent in my class .

2) WE DON'T KNOW A HAPPIER PERSON THAN IM.

= HE IS HAPPIEST  PERSON WE KNOW .

Ex2:Rewrite these sentences but stay the same:

1.No one in my class is more intelligent than Lan. Lan is the most intelligent in my class.

2.We don't know a happier person than him. He is happiest person.

3.Nothing is more interesting than football. Football is the most ineresting.

4.Is this the biggest hat you've got? Have you got a biggest hat you've got?

5.Everest is higher than any mountains in the world. Everest is the highest mountain in the world

6.No one in my class is fatter than Minh. Minh is is the fattest in my class.

7.Mr Ron is the richest man in our town. No one in our town is richer than Mr Ron.

8.No one in my group is better at English than Lan. Lan is best in my group.

Ex2:Rewrite these sentences but stay the same:

1.No one in my class is more intelligent than Lan. Lan is.............the most intelligent in my group.............

2.We don't know a happier person than him. He is........happiest person we know............

3.Nothing is more interesting than football. Football is...............the most interesting .............

4.Is this the biggest hat you've got? Have you got.........any hat bigger.........?

5.Everest is higher than any mountains in the world. Everest is..................the highest mountains in the world.................

6.No one in my class is fatter than Minh. Minh is..........the fattest in my class...........

7.Mr Ron is the richest man in our town. No one...............in our town is richer than mr ron.................

8.No one in my group is better at English than Lan. Lan is.....................the best at english in my group...................

2. It is the most famous person I have ever met.

3. This is the biggest sum of money we have ever got.

4. That is the smallest boy we have ever met.

1.      My mother is _____the best__________ (good) cook in the world.

2.      Terrence Tao is ____the most intelligent___________ (intelligent) person in the world.

3.      Where are       _____the nicest__________ (nice) beaches in your country?

4.      Hawaii is _______ the most interesting________(interesting) place I’ve ever been to.

5.      Dave is ______the tidiest_________ (untidy) person in class.

6.      July is generally _____the hottest__________ (hot) month of the year.

7.      The blue whale is PhuQuoc is _______the heaviest________ (heavy) animal on earth.

8.      Phu Quoc is ______ the largest_________ (large) island in Vietnam.

9.      I think it is one of _____ most boring__________ (boring) war films I’ve ever seen.