Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Phonetics: Choose the word whose underlined part is pronounced differently:
1. A. tooth B. clothing C. bath D. both
2. A. gather B. monthly C. father D. brother
3. A. though B. thank C. through D. thin
4. A. clip B. give C. twice D. stupid
5. A. studio B. documentary C. cute D. stupid
a)\(Fe+CuSO4-->Cu+FeSO4\)
b) \(n_{Fe}=\frac{1,96}{56}=0,035\left(mol\right)\)
\(m_{CuSO4}=\frac{100.10}{100}=10\left(g\right)\)
\(n_{CuSO4}=\frac{10}{160}=0,0625\left(mol\right)\)
Do \(0,036>0,0625\Leftrightarrow\) \(n_{Fe}< n_{CuSO4}\)
=> CuSO4 dư.Tính theo n chất hết (Fe)
Chất rắn B là Cu
\(n_{Cu}=n_{Fe}=0,035\left(mol\right)\)
\(m_{Cu}=0,035.64=2,24\left(g\right)\)
c) m dd A =\(m_{Fe}+m_{ddCuSO4}-m_{Cu}=1,96+100-2,24=99,72\left(g\right)\)
dd A là FeSO4 và CuSO4 dư
\(n_{FeSO4}=n_{Fe}=0,035\left(mol\right)\)
\(m_{FeSO4}=0,035.152=5,32\left(g\right)\)
\(C\%_{FeSO4}=\frac{5,32}{99,72}.100\%=5,33\%\)
\(n_{CuSO4}=n_{Fe}=0,035\left(mol\right)\)
\(n_{CuSO4}dư=0,0625-0,035=0,0275\left(mol\right)\)
\(m_{CuSO4}dư=0,0275.160=4,4\left(g\right)\)
\(C\%_{CuSO4}dư=\frac{4,4}{99,72}.100\%=4,41\%\)
I. Choose the words whose underlined part is pronounced differently from that of the others in each group.
1. A. clip B. give C. twice D. stupid
2. A. favorite B. animal C. channel D. programme
3. A. studio B. documentary C. cute D. industry
4. A. when B. where C. best D. detective
5. A. weather B. newsreader C. teaching D. repeat
Question I. Choose the words whose underlined part is pronounced differently from that of the others in each group.
1. A. theater B. throw C. another D. bathroom
2. A. plants B. jars C. gardens D. throws
3. A. elephants B. protects C. handbooks D. cleans
4. A. foxes B. bottles C. clothes D. magazines
5. A. birthday B. three C. theater D. there
6. A. Earth B. earthscraper C. themselves D. things
7. A. weather B. cathedral C. think D. thank
8. A. weather B. brother C. cathedral D. although
9. A. parks B. computers C. astronauts D. maps
Cách phát âm đuôi " s+ es"
/s/ thì tận cùng kết thúc:p,t,f,k
/iz/ thì tận cùng kết thúc:o,s,ss,ch,sh,x
[cô dạy thêm mình hay đọc "o,s,ss,ch,sh" là : ông sao sáng chiếu sáng" :>]
/z/ thì tận cùng kết thúc:còn lại
-----nếu cần-----
Choose the word whose underlined part is pronounced differently from that of the others in each group.
1. A. excited B. nice C. library D. living
2. A. stand B. actor C. habit D. party
3. A. works B. wants C. grabs D. sleeps
4. A. cute B. busy C. tutor D. student
5. A. cheese B. free C. three D. cheer
6. A. easy B. best C. merry D. test
7. A. kitchen B. meal C. fish D. crisps
8. A. menu B. music C. under D. usually
9. A. habit B. hamster C. hard D. have
10. A. wash B. happy C. stand D. sad
11. A. calculator B. pupil C. tutor D. lucky
12. A. subject B. music C. buddy D. budgie.
I. Pronunciation: Find the word which has a different sound in the part underlined.
1. A. theater B. through C. there D. three
2. A. brother B. breath C. either D. clothes
3. A. favorite B. animal C. channel D. programme
4. A. studio B. documentary C. cute D. industry
5. A. prize B. excite C. capital D. design
6. A. designed B. received C. cycled D. rewarded
7. A. tomorrow B. tower C. crowd D. around
8. A. crowd B. cow C. snow D. shower
9. A. house B. colour C. blouse D. housework
10. A. cow B. slow C. window D. know
11. A. play B. island C. train D. paint
12. A. can B. jam C. sand D. Smart
13. A. schedule B. contest C. racket D. every
14. A. yesterday B. send C. destination D. exciting
15. A. karate B. exhausted C. equipment D. pedal
Giai nhanh giup minh vs ak minh can gap
1B
2A
3D
4C
5D
1. A. theater B. there C. through D. three
2. A. favorite B. animal C. channel D. programme
3. A. studio B. documentary C. cute D. industry
4. A. something B. theatre C. neither D. monthly
5. A. thirty B. than C. therefore D. those