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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. 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
Bài 1: Find the word which has a different sound in the part underlined
1, A. the B. there C. think D. they
2, A. earth B. feather C. theater D. thanks
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
7, A. programme B. sport C. most D. show
8, A. thirty B. them C. both D. theme
9, A. schedule B. when C. red D. comedy
10, A. brother B. through C. then D. weather
Exercise 1: Find the word which has a different sound in the part underlined.
1. A. when B. where C. best D. detective
2. A. weather B. newsreader C. teaching D. repeat
3. A. clumsy B. cute C. but D. just
4. A. earth B. thanks C. feather D. theater
5. A. although B. think C. with D. they
6. A. thirty B. theme C. both D. breathe
7. A. brother B. weather C. through D. than
8. A. schedule B. comedy C. educate D. when
9. A. channel B. game C. national D. relax
10. A. show B. programme C. sport D. most
11. A. this B. feather C. smooth D. south
12. A. leather B. that C. theatre D. then
13. A. nothing B. gather C. method D. death
14. A. something B. brother C. them D. weather
15. A. those B. there C. thank D. without
16. A. soothe B. south C. thick D. athlete
17. A. healthy B. northern C. thirsty D. mouth
18. A. this B. these C. them D. earth
19. A. think B. month C. everything D. clothing
20. A. sixth B. another C. teeth D. author
21. A. tooth B. clothing C. bath D. both
22. A. gather B. monthly C. father D. brother
23. A. though B. thank C. through D. thin
24. A. clip B. give C. twice D. stupid
25. A. studio B. documentary C. cute D. stupid
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. 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
tưởng m đi đọc truyện r :)