Read the following pasage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 7 to 11.

When you first apply for a job, you (7)_________not succeed in getting it. It’s always a good (8)_________to ask them to explain to you what prevent you from beating the other candidates. Don’t complain about the situation, but ask them to advise you (9)_________whta you can do better next time. Perhaps the interviewer disapproved of or disagree with something you said. Perhaps they just glanced at your application and saw something that made it easy to choose between you and another  candidate. Don’t regard it as a failure, but recognize it as a chance to  learn  more. (10)_________you don’t worry too much about it and continue to believe in yourself, you’ll eventually find the chance you’ve been waiting for. Then, your family and friends will be able to (11)_________you on your success.

Điền ô số 8

A. means

B. opinion

C. idea

D. method

Oxi hoá etilen bằng dung dịch KMnO₄ thu được sản phẩm là :

A. C₂H₄(OH)₂, K₂CO₃, MnO₂

B. MnO₂, C₂H₄(OH)₂, KOH

C. K₂CO₃, H₂O, MnO₂

D. C₂H₅OH, MnO₂, KOH

Chậu 1:\(n_1sini_1=n_2sinr_{_{ }2}\Rightarrow i_1=70\)

Chậu 2:\(n_1sini_1=n_2sinr_2\Rightarrow n_2=1,88\)

Trong n mol chất thì có N = N_A. n nguyên tử=>nZn=9000/6,02*10^23=1,5*10^(-20)

mZn=1,5*10^(-20)*65=9,72*10^(-19) gam

Giữa các chất nào vậy bạn

\(C\%NaCl=\dfrac{40\cdot100}{\text{40+120}}=25\%\)

\(nNaCl=\dfrac{40}{58,5}=0.68mol\)

\(CMNaCl=\dfrac{0,68}{0,12}=5,67M\)

Tham khảo thử thôi nhé

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 28

  After years of cooler climate, the days get longer, the buds (25) ________ in the trees, birds sing, and the world (26) ________ a green dress. Springtime passes (27) ________ summer. The whole world knows that summer will not (28) ________ forever. The magic of all the spells in the world cannot keep it for us. The flowers blossom, the leaves turn yellow and then drop to the ground, (29) ________ the world turns into autumn whether people like it or not.

A. succumb

B. evaluate

C. forego

D. last

C2H5OH+Na--> C2H5ONa +1/2H2 (1)

C6H5OH+Na-->C6H5ONa+1/2H2 (2)

C6H5OH+ 3Br2-->C6H2OHBr3+ 3HBr

nC6H2OHBr3=66,2/331=0,2----->nC6H5OH=0,2

nH2=6,72/22,4=0,3

-->nH2(1)=0,3-02=0,1

mhh=0,1*46+0,2*94=23,4

%mC2H5OH=(0,1*46*100)/23,4=19,66%

%mC6H5OH=(0,2*94*100)/23,4=80,34%

Ôi mẹ ơi, đánh mỏi tay