nêu phương trình chuyển đổi hóa học sau

a)CA→CAO→\(Ca\left(OH\right)_2\) →\(CaCO_3\)

B)\(SO_3\)→\(H_2SO_4\)→\(Na_2SO_4\)

biết 4,48 lít khí \(CO_2\)(ĐKTC)tác dụng vừa hết với 200ml dd \(Ba\left(OH\right)_2\) sản phẩm là \(BaCO_3\) VÀ \(H_2O\)

a)viết pthh

b)tính nồng độ mol của dung dịch\(Ba\left(OH\right)_2\) ĐÃ DÙNG

c)tính khối lượng chất kết tủa thu đc

có 4 lọ không nhãn mỗi lọ đựng chất rắn sau :NaOH;HCl;\(Ba\left(OH\right)_2\);NaCl hãy trình bày cách nhận biết chất đựng trong mỗi lọ bằng phưng pháp hóa học .viết các pt nếu có

bằng phưng pháp hóa học nào hãy nhận bt các dd:NaCl:HCl;\(Na_2SO_4\)

Hòa tan hoàn toàn 6,5 gam Zn trong dung dịch \(H_2SO_4\) loãng (nồng độ 20%)vừa đủ

a)viết pthh của phản ứng

b)tính khối lượng muối tạo thành và thể tích khí hiđro sinh ra(đktc)

c)tính khối lượng \(H_2SO_4\) 20% ĐÃ DÙNG

bằng phương pháp hóa học nào hãy nhận biết các dung dịch:NAOH,NACL,HCL,\(Na_2SO_4\)

     Practical stress management can help students deal with their worries and become more productive, competent and efficient. First of all, students must be able to design and stick to a timetable. Choose a relaxing break between work and study, even if it’s just taking out time to breathe. In addition, a healthy lifestyle is essential for students. Let’s drink more water as well as take out time to get some air and exercise. Furthermore, organization is very important in academic life for dealing with stress. By keeping academic notes organized, turning in assignments on time, and keeping track of all deadlines, stress can be reduced to a great extent. Stress can also get worse if a person feels lonely. Therefore, by letting out all your thoughts to someone you trust, you immediately feel a lot better. However, if you feel extremely stressed out, take a break and do something you love. Whether it is painting or listening to music, doing something you enjoy can cheer up your mood and distract you from a stressor. It’s about time that we students accept that we can achieve just as much in life without all the stress.

( NB)Question 29. Practical stress management can help students               .

      A. deal with stress                                          B. have more time

      C. face up to the worst situation                     D. think critically

( TH)Question 30.What can students do to lead a healthy lifestyle?

      A. Visit their doctor as scheduled.

      B. Not to put much pressure on time management.

      C. Follow the timetable strictly.

      D. Go outside for fresh air, do regular exercises and drink more water.

( VD)Question 31.Why is organization important in academic life?

A.    Because it can help students get good grades.

      B. Because it is a must for all students.

      C. Because it can help students reduce stress.

      D. Because it leads to better results.

( VD) Question 32Which of the following sentences is True?

      A. You should stay alone when being under pressure.

      B. When you feel lonely, you shouldn’t grab someone to talk.

      C. The more lonely you are, the more stress you can have.

      D. I t is believed that stress can control itself.

II. LANGUAGE FOCUS: (4,0pts)

Choose the word whose underlined part is pronounced differently from the others.

(NB)Question 9: A. adolescence                    B. emergency              C. helpline            D. tense

(TH)Question10: A. delighted                       B. depressed               C. embarrassed      D. stressed

Choose the word whose main stress is different.

(TH)Question 11: A. wonderful                      B. emergency             C. beautiful                D. indicator

Choose the best answer.

(NB)Question 12: His parents said design graduates _____ find jobs easily.

                        A. will not                               B. won’t                      C. cannot                     D. wouldn’t

(TH)Question 13: She told her mother that _____ a very high score in her test.

                        A. she had got             B. she had get             C. she has get              D. she has got

(TH)Question 14: My parents asked me to find out                 to improve my English.

                          A. what                                  B. which                       C. how                D. where

 (VDC)Question 15:“ She asked me              the seat                       or not.

                        A. if – had occupied                                                                  B. whether – was occupied

                       C. if– has been occupied                                                            D. whether – occupied

 (NB)Question 16:  By the age of 15, teenagers are better able to                 a more demanding curriculum.

                         A. solve                                   B. operate                      C. handle           D. deal

 (TH)Question 17. The advice columnist said, “It sounds like the problem is not your appearance but the                               you see yourself.”

                        A. route                                   B. distance                     C. way                D. behavior

 (NB)Question 18: Choose the word does not fit in the sentences: “You may feel _____ before taking an important exam.”

                        A. bored                                  B. worried                     C. stressed                D. surprised

(TH)Question 19: My closest friend is not very                      and she likes having a small friend group but I like talking with a lot of people and hanging out.

                       A. society                                   B. sociable                      C. social                                              D. socialist

 (VD)Question 20: He asked his father how to _____ negative emotions.

                        A. cope to                               B. cope of                      C. cope for               D. cope with

(VD)Question 21:“My parents want Mai to go to a top college and study medicine.”             - “__________”

                        A. Really?                               B. Do they?                 C. May be not?            D. What college?

(VD)Question 22: “My life’s got stuck these days. I am so depressed and unable to think of anything”.

                             - “__________”

A. You will be tired.   B. Stay calm. Everything will be alright.          C. Stay stuck there.          D. No, thanks.

(NB)Question 5: How does Miss Sweetie like about her work?

             A. Very much           B. Not much                            C. Too much                D. More than other jobs

(TH)Question 6: There are _____things that Miss Sweetie likes about her work.

A. one                         B. two                                     C. three                       D. four

(NB)Question 7: The advisors also need to be very  _____ about how to put the advice into words.     

A. sensitive                 B. happy                               C. careful                       D. excited

(TH)Question 8:  The words should be used _____  so that the person can get over the negative feelings.

A.importantly     B. usefully                              C. carefully                 D. sensitively