Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
1. A. this B. think C. thank D. thieves
2. A. gather B. bathe C. birthday D. weather
3. A. tooth B. breathe C. through D. earth
4. A. thirty B. than C. therefore D. those
5. A. brother B. breath C. either D. clothes
6. A. hate B. air C. chair D. hair
7. A. prepare B. carry C. share D. fair
8. A. racket B. skateboard C. games D. player
9. A. favorite B. animal C. channel D. programme
10. A. cold B. photo C. continent D. poster
11. A. city B. capital C. nice D. excite
12. A. tomorrow B. tower C. crowd D. around
13. A. postcard B. come C. home D. so
14. A. programme B. sport C. most D. show
15. A. favorite B. night C. fine D. high
Choose the word that has the underlined part pronounced differently for the rest.
1. a. this b. think c. thank d.thieves
2. a. gather b. bathe c. birthday d. weather
3. a. tooth b. breathe c. through d. earth
4. a. thirty b. than c. therefore d. those
5. a. mouth b. Thursday c. nothing d.worthy
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
\(n_{FeSO4}=n_{Fe}=0,035\left(mol\right)\)
\(m_{FeSO4}=0,035.152=5,32\left(g\right)\)
\(C\%_{FeSO4}=\frac{5,32}{99,72}.100\%=5,33\%\)
\(n_{CuSO4}=n_{Fe}=0,035\left(mol\right)\)
\(n_{CuSO4}dư=0,0625-0,035=0,0275\left(mol\right)\)
\(m_{CuSO4}dư=0,0275.160=4,4\left(g\right)\)
\(C\%_{CuSO4}dư=\frac{4,4}{99,72}.100\%=4,41\%\)
1, A. the B. there C. think D. they
2, chịu
3, A. when B. where C. detective D. best
4, A. clumsy B. cute C. just D. but
5, A. weather B. newsreader C. teaching D. repeat
6, A. game B. relax C. national D. channel
1. C
2. D (nếu gạch chữ "th")
3. C (nếu gạch chân chữ "e" đầu của từ detective)
4. B
5. A
6. A
#Mγη(๑◕︵◕๑)
I.Choose the word whose underlined part is pronounced differently from the others.
1. A. A. thirstyB. throwC. themeD. there
2. A. toothB. breatheC. throughD. earth
3 A. inviteB. liveC. rightD. night
4. A. watchB. channelC. childrenD. schedule
5. A. what B. who C. where D. when
6. A.recycle B. hobby C. sky D.my
7. A. glass B. fast C. plastic D. apple
8. A. polluted B. prepared C. recycledD. watered
I.
1. A
2. C
3. C
4. C
III.
1. A
2. A
3. B
4. D
5. B
6. A
7. C
8. A
9. C
10. B
11. C
12. A
13. D
14. D
15. B
16. C
IV.
1. C
2. D
3. C
4. C
5. A
6. C
V.
1. takes
2. are studying
3. does the book cost?
4. is raining
5. buy
6. run
7. is
8. drawing/making
9. to make
10. to go to
VI.
1. How often does your father watch the News?
2. Who is your favourite actor?
3. When do you watch TV?
4. What is Tim doing now?
5. How much is the new television?
6. Why are you studying?
7. Where do you buy this dress?
VII.
1. Linh's car is cheaper than Hung's car.
2. She spends 3 hours getting to the city centre.
3. I am keen on collecting stamps.
4. Can you tell me how to get to the National Museum?
5. Because of the heavy rain, I can't go to work.
sai nhé bạn