Ocean water is too salty drink. It is also too salty for watering plants. We must have the ways to make fresh water from salty water. We should be careful not to waste water

         Ocean water is too salty (drink/drinking/ to drink/ to drinking). It is also too salty for watering plants. We must have the ways to make fresh water from salty water. We should be (careful/ careless/ carefully/ carelessly) not to waste water.

Hc tốt

1.on

2.to drink

3.careful

Hóa học đâu có ở lớp 6 đâu bạn mà đây cũng đâu phải là môn Hóa

Ai đề môn Hoá đâu bn, bn sao v

We can reuse ……………..

     A. water                       B. air                            C. bottles

Trả lời:

C. bottles

HT

1/.Give the correct form of the word to complete the sentences:

1, She locked the door so as ........... not to be disturbed....................... .                  NOT DISTURB

2, We receive a lot of ........encouragement........................from our teacher.      ENCOURAGE

3, Many ...........cultural................... activities are held every year.         CULTURE

4, l'm .......amazing........................ that he won price                               AMAZE

2/ Chircle the underlined words or phrase (A, B, C or D) that are incorrect and correct them:

1, We have sung together ever when l was a small child. ->....................since.................

               A                                    B         C                  D                                            

2, My father's car is the same colour  my uncle's car. -> ........as.............................

                A                B                       C               D

3, Shall you close the window for me, please? -> .........Can..........

      A               B                       C              D

1) 1. not be disturbed 

2.encouragement

3. cultural

4.amazed

2) 1A --> when -> since

 2C --> --> as

3A ---> SHALL --> WILL

Bạn tham khảo :

My favourite hobby is reading. I enjoy reading a book when I am free. I started to do it when I was four years old. The first time I did it, I felt interested. So I kept reading. The teachers always taught me to read the difficult words. I was happy when I read a story with a happy ending. I was thrilled when I read a detective story. I enjoy reading because I to explore the imaginative world of my favourite author, J.K.Rowling who writes “ Harry Potter” . There are a lot of advantages of reading. Reading can make me relaxed and calm. I can also learn new vocabulary items. Then I can further improve my English. Moreover, it can give me an unlimited imagination, so I can write books in the future. I can learn the different cultures and customs of other countries in the world too. I read at least one hour every day. I read books by myself. I usually read it at home. I wish I could read different kinds of books because it might be very challenging.

Nguồn : lazi.vn

My favourite hobby is reading. I enjoy reading a book when I am free. I started to do it when I was four years old. The first time I did it, I felt interested. So I kept reading. The teachers always taught me to read the difficult words. I was happy when I read a story with a happy ending. I was thrilled when I read a detective story. I enjoy reading because I to explore the imaginative world of my favourite author, J.K.Rowling who writes “ Harry Potter” . There are a lot of advantages of reading. Reading can make me relaxed and calm. I can also learn new vocabulary items. Then I can further improve my English. Moreover, it can give me an unlimited imagination, so I can write books in the future. I can learn the different cultures and customs of other countries in the world too. I read at least one hour every day. I read books by myself. I usually read it at home. I wish I could read different kinds of books because it might be very challenging.

1. tomorrow / can / not / we / somewhere / I / so / working / go / am

=> I am not working tomorrow so we can go some where.

2. back / in / months / England / going / two / are / to / they

=> They are going back to England in two months.

3.struggle / on / always / nature / home / life / at / is / the farm / with / a

=> At home on the farm, life is always a struggle with nature.

4. lot / l / when / was / Da Lat / , / in / l / a / of / place. / visited / beautiful

=> I was went visited a lot of beatiful place in Da Lat .

5 . l / an / met / and / Englishman / to / talked / in / him / English. / yesterday,

=> I met and talked to an English man in English yesterday

1. I am not working tomorrow so we can go some where.

2. They are going back to England in two months.

3.  At home on the farm, life is always a struggle with nature

Chúc bn học tốt

\(2KClO_3\rightarrow^{t^o}2KCl+3O_2\)

2                          2                  3

0,03          \(\rightarrow\)  0,03           0,045

\(n_{KClO_3}=\frac{m}{M}=\frac{3,675}{39+35,5+16.3}=0,03mol\)

\(O_2+C\rightarrow^{t^o}CO_2\)

1          1            1

0,045       \(\rightarrow\) 0,045       0,045

\(m_C=n.M=0,045.12=0,54g\)

\(V_{CO_2\left(ĐKTC\right)}=n.22,4=0,045.22,4=1,008l\)

áp dụng ĐLBTKL: \(m_A+m_{O_2}=m_{A_2O_x}\)

\(\Leftrightarrow0,84+m_{O_2}=1,2\)

\(\Leftrightarrow m_{O_2}=0,36g\)

\(n_{O_2}=\frac{m}{M}=\frac{0,36}{32}=0,1125mol\)

PTHH: \(4A+xO_2\rightarrow^{t^o}2A_2O_x\)

           \(\frac{0,045}{x}\)   \(0,01125\)     mol

\(\rightarrow n_A=n_{O_2}=\frac{0,01125.4}{x}=\frac{0,045}{x}mol\)

\(\rightarrow M_A=\frac{m}{n}=\frac{84}{\frac{0,045}{x}}=0,84.\frac{x}{0,045}\approx18,67x\left(g/mol\right)\)

Biên luận 

Vậy kim loại đó là sắt

1;b

2;c

3;c

4;a

5;d

Hok tốt