đáp án là 20168

duyệt

dd fe(no3)2 có lẫn cu(no3)2 và agno3 bằng cách nào để làm sạch muối fe(no3)2 viết pthh

cho 1 thanh đồng nặng 10g vào 200ml dd AgNO3 0.1M sau một thời gian lấy ra cân lại thấy thanh dồng có khối lượng 10.76g (giả sử Ag sinh ra bám hoàn toàn lên thanh dồng)các chất có trong dd và số mol của chúng là

nhúng 11g hỗn hợp kim loại Fe và Al theo tỉ lệ 1:2 vào 1000ml dd AgNO3 0.8M khấy đều cho pư xảy ra hoàn toàn

a) tính kl của chất rắn sinh ra

b) tính CM của dd thu được

hòa tan m g Fe3O4 vào dung dịch HCL dư được dung dịch X. Thêm NaOH dư vào dung dịch X rồi nung kết tủa sinh ra trong hh đến kl không đổi thì thu được 24 g chất rắn. để pư vừa đủ với m g trên cần bao nhiêu g CO? (giải chi tiết hộ mình với ạ)

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 31 to 35.

When you first arrive in a foreign culture, often your first reaction is completely positive. Everything seems exciting, different and fascinating. It’s an (31)                                           . If you are just on a short holiday, you will probably never leave this phase.

(32)                     , if you stay longer, your attitude can start to change. As you start to realize  (33)               little you really understand the new culture, life can get frustrating. People misunderstand what you are trying to say, or they may laugh at you when you say something incorrectly. Even simple things, like posting a letter, can seem very difficult to you. Thus, you are likely to get angry or upset when things go wrong.

With time, though, you start to (34)                       to become more comfortable with the differences and better able to handle frustrating situations. Your (35)              of humor reappears. Finally, you may feel enthusiastic about the culture once again, enjoy living in it, and even prefer certain aspects of the culture to your own.

(Adapted from Navigate – Coursebook, OUP 2015)

Điền vào ô 34.

A. replace

B. maintain

C. adjust

D. keep

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 31 to 35.

When you first arrive in a foreign culture, often your first reaction is completely positive. Everything seems exciting, different and fascinating. It’s an (31)                                           . If you are just on a short holiday, you will probably never leave this phase.

(32)                     , if you stay longer, your attitude can start to change. As you start to realize  (33)               little you really understand the new culture, life can get frustrating. People misunderstand what you are trying to say, or they may laugh at you when you say something incorrectly. Even simple things, like posting a letter, can seem very difficult to you. Thus, you are likely to get angry or upset when things go wrong.

With time, though, you start to (34)                       to become more comfortable with the differences and better able to handle frustrating situations. Your (35)              of humor reappears. Finally, you may feel enthusiastic about the culture once again, enjoy living in it, and even prefer certain aspects of the culture to your own.

(Adapted from Navigate – Coursebook, OUP 2015)

Điền vào ô 31.

A. adventure

B. adventurous

C. adventurer

D. adventurously