Giúp mik với ạ! Mik ngu Hóa quá! Cô giảng mà không hiểu gì hết trơn! T_T

                                Giúp mik vớ mn ơi! Mik đang cần gấp!

II/ Cho 6,5 gam kẽm tác dụng với 3,65 gam axit clohidric. Sau khi phản ứng xảy ra thu được muối kẽm clorua và khí hidro. 

       a) Viết PTHH của phản ứng xảy ra.

       b) Tính khối lượng muối tạo thành.

     Giúp mik với! Mik dốt Hóa quá! Huhu T-T

Mọi người giúp mik với ! T-T

Bài 4: Phân tử ADN có số Nu loại A1 = 50, G1 = 100, A2 = 150, G2 = 200

a. Tính tổng số Nu của ADN

b. Tính số vòng xoắn của ADN

c. Tính chiều dài của AND

Bài 5: Một gen có 3000 Nu với 20%A. Trên mạch 1 của gen có 20%T, 30%G

a. Tính tỉ lệ % và số lượng từng loại Nu của cả gen

b. Tính tỉ lệ % và số lượng từng loại Nu trên từng mạch đơn của gen.

Bài 6: Một gen có 90 chu kì xoắn và có số Nu loại Adenin là 20%. Mạch 1 của gen có A=20% và T=30%. Mạch 2 của gen có G=10% và X=40% so với số lượng Nu của một mạch.

a. Tính chiều dài và khối lượng của gen biết khối lượng trung bình của 1 Nu là 300 đơn vị cacbon

b. Tính số lượng từng loại Nu của gen và của mỗi mạch gen.

Bài 7: Một gen tự nhân đôi một số lần, đã tạo được 32 gen con. Hãy xác định số lần nhân đôi của gen.

Bài 8: Một gen có 600G chiếm 20% số Nu của gen. Trên mạch 1 có A nhiều hơn T là 100 Nu và có X nhiều hơn G là 300 Nu

a. Tính số lượng từng loại Nu của cả gen.

b. Tính số lượng từng loại Nu trên từng mạch đơn của gen.

Bài 9: Một gen dài 5100 A0 và có A bằng 1,5 G. Trên một mạch đơn có 20% T, 10%X

a. Tính khối lượng phân tử, số vòng xoắn của gen.

b. Tính số lượng từng loại Nu trên mỗi mạch đơn của gen này

Bài 10: Một gen có 3600 liên kết hidro và 30%A

a. Tính số lượng từng loại Nu của gen

b. Tính chiều dài của gen bằng Micromet và khối lượng phân tử của gen

      Mong mọi người giúp mik! Mik cảm ơn nhiều ạ!

VII. Read the passage and do the tasks that follow.

       Around 60 kilometers southwest of Ha Noi, Perfume Pagoda is one of the largest religious sites in Huong Son Commune, My Duc District. It comprises a complex of pagodas and Buddhist shrines built into the limestone cliffs of Perfume Mount, spreading alongside the mountain up to the peak. The complex's center is Inner Temple, right inside Huong Tich Cavern. Huge numbers of pilgrims flock to the site during the Perfume Pagoda Festival, which begins in the middle of the first lunar month and lasts until the middle of the third one (or from February to April) in order to pray for happiness and prosperity in the coming year. Also, it is a very popular opportunity for young couples to meet and for numerous romances to be formed. On this special occasion, a wide range of traditional cultural activities is incorporated. Perfume Pagoda is not only a religious site, but a great sight-seeing spot in Viet Nam as well.

Task 1. Read the passage again and answer the questions.

    1.Where can a complex of pagodas and Buddhist shrines be found in Huong Son Commune ?      ________________________________________________________________________
    2.How long does the Perfume Pagoda festival last?  ______________________________________________________________________ 
    3.What do people go to Perfume Pagoda festival for?  ______________________________________________________________________ 
    4.What activities can people take part in?  ______________________________________________________________________ 
    5.Why is the festival also popular to young couples?  ______________________________________________________________________ 

VI. Read the passage and choose the correct answer A, B, C, or D for each question.

                                                                  Son Doong Cave

      Located in the limestone mountains of Phong Nha - Ke Bang National Park. Son Doong Cave was first found in 1991 by Ho Khanh, a local man. In 2009, the cave was explored and published by a group of scientists from the British Cave Research Association.  Son Doong Cave was formed from 2 to 5 million years ago when the river flowed through the limestone mountain area and was buried. The water eroded limestone and created an underground tunnel. In soft limestone areas, the collapse of the tunnel ceiling formed large holes which became giant domes afterward. The cave is about 200m high, 200m wide, and at least 8 5km long. Especially, Son Doong consists of two entrances, which are unique among explored caves in Phong Nha - Ke Bang National Park. Exploring the cave, visitors were surprised with the spectacular scenery of numerous stalactites of which some giant stalagmites are more than 70 meters high. Deep inside the cave exists a grandiose tropical jungle called the “Garden of Eden" by the explorers. The jungle is home to a diversified system of fauna and flora. Besides, the cave possesses a 2.5-kilometer underground river. Not far from the “Garden of Eden” lies an enormous “pearl collection” consisting of tens of thousands of small stone pieces in dry ponds, contributing to the magnificent beauty of the cave.

    1. The reason why Son Doong Cave was formed is that ________.

A. an underground tunnel was buried in the area            B. the limestone areas were soft 

C.it only happened from 2 to 5 million years ago             D. the river was buried in the limestone mountains

   2. The most important feature of “Garden of Eden” is ____________. 

A.the biodiversity                                       B. giant stalagmites 

C. the biggest length                                 D. the river below

   3. We can infer from the passage that ________. 

A.tunnels and giant domes were formed at the same time 

B. “pearl collection” contains a lot of precious stones 

C.we can live in the cave with the air and water 

D. “Garden of Eden” is in the underground river

   4. All of the following are the wonderful features of Son Doong Cave EXCEPT ________. 

A. tropical jungle inside with the biodiversity 

B.spectacular scenery of numerous stalactites and stalagmites 

C.a river flowing over 2.5 kilometers along the cave 

D.the big sizes of the cave and the giant domes

   5. The thing that makes it different from other caves in Phong Nha – Ke Bang National Park is _______. 

A. stalactites and stalagmites                                    B. the two entrances into the cave 

C. its discovery by a local man                                  D. large holes in the ceiling 

IV. Fill in each blank in the passage with the correct word from the box. There are some extra words. 

    Cat Ba National Park is dominated by limestone areas where there are numerous waterfalls, caves, and caverns. It is home to 32 types of mammals. Forests here have many unique types with (16)___ features.  Being the roof of Cat Ba Island, Ngu Lam Peak offers visitors a (17)___ view of the island. Experiencing trekking to the peak will give you a good chance to have a(n)(18)___ understanding of the natural beauty as well as (19)________ culture of the locals. It also has hundreds of large and small beaches, but Cat Co beaches attract tourists most by the (20)________ natural landscape. 
 

V.Read the passage carefully, and then do the following tasks.

        Our school has an organic garden. We learn about growing vegetables and looking after them in our food science lessons. In the holidays, we can volunteer to work in the garden. My family lives in a flat so it’s great for me to have a garden at school. Volunteers can take some vegetables home too, so my parents are very happy that I like working there. My aunt and uncle live on a farm in the Red River Delta. It isn’t very big but they have hens, pigs, and cows. We always go to stay with them in summer. It’s a beautiful place and the food is amazing. All the vegetables are so fresh and, because the farm is organic, we know they are healthy, too. We live in Ha Noi and my parents buy food at The Viet Fresh Farm Shop near our flat. It is very famous in our city and all the food they sell is from animals that live on the farm or vegetables that they grow. They organize a food festival once a year and we always go to eat the free food and watch cookery demonstrations. They are really interesting and you can learn a lot about cooking.

     A. Read the passage again. Match the underlined words with the correct meanings (1-6).

1. Very good________________________________.

2. Something or someone that a lot of people know about_______________________.

3. Activities which explain and show how to do something_______________________.

4. People working or helping because they want to, not for money_________________.

5. The animals that the meat beef comes from__________________________.

6. Offer to do something for no money__________________________. 

Bài 12: Khoanh tròn vào đáp án đúng:

   Ha Long Bay Ha Long Bay is one of the most famous tourist (1)_________ in Viet Nam. It (2)_________ among the Seven Wonders of the World. In the old Vietnamese, ‘Ha Long’ literally means ‘descending dragons.’ (3)_________ its popularity, not many people know about the legend behind its name. (4)_________ has it that at the early time of the country, Vietnamese people had to fight against aggressive invaders from the North through the sea. The Jade Emperor then sent the Mother Dragon and her children to help Vietnamese (5)_________ the enemy and protect their homeland. The dragons destroyed the enemy’s army by fire and giant emeralds from their mouths. These emeralds then (6)_________ around the battlefield on the sea and created a defensive wall, which made the enemy’s ships all sink. It (7)_________ that the wall of emerald turned (8)_________ island and islets that we can see today. After the battle, The Mother Dragon and her children didn’t come back to the heaven, but stayed with the ancient Vietnamese and help people build their country. 

   1. A. appeals   B. attentions   C. attractions  D. attachments 

   2. A. is listed   B. is listing    C. lists    D. listed

   3. A. But    B. Yet    C. Despite    D. In spite

   4. A. Story    B. Tale    C. Fable    D. Legend

   5. A. defeat    B. defeated    C. defeating   D. are defeated

   6. A. went    B. scattered    C. turned    D. mattered

   7. A. is believed   B. believes    C. was believed   D. believed

   8. A. into    B. out    C. off    D. on  

      Mong mọi người giúp mình! Mình cảm ơn ạ!