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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
I. Choose the words whose underlined part is pronounced differently from that of the others in each group.
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
\(n_{FeSO4}=n_{Fe}=0,035\left(mol\right)\)
\(m_{FeSO4}=0,035.152=5,32\left(g\right)\)
\(C\%_{FeSO4}=\frac{5,32}{99,72}.100\%=5,33\%\)
\(n_{CuSO4}=n_{Fe}=0,035\left(mol\right)\)
\(n_{CuSO4}dư=0,0625-0,035=0,0275\left(mol\right)\)
\(m_{CuSO4}dư=0,0275.160=4,4\left(g\right)\)
\(C\%_{CuSO4}dư=\frac{4,4}{99,72}.100\%=4,41\%\)
7. A. around B. about C. country D. found
8. A. plants B. jars C. gardens D. throws
9. A. elephants B. protects C. handbooks D. cleans
10. A. foxes /iz/ B. bottles /z/ C. clothes /z/ D. magazines /z/
I. Choose the words whose underlined part is pronounced differently from that of the others in each group.
1. A. bed B. setting C. decide D. get
2. A. easy B. eat C. learn D. tea
3. A. sit B. in C. if D. fine
4. A. child B. watch C. chin D. school
5. A. come B. no C. open D. home
I. Choose the words whose underlined part is pronounced differently from that of the others in each group.
1. A. customer B. sticker C. student D. question
2. A. stay B. listen C. study D. start
3. A. stop B. castle C. station D. stamp
4. A. recycle B. reusable C. article D. usually
5. A. single B. plastic C. simple D. bottle
6. A. social B. people C. talk D. useful
7. A. around B. about C. country D. found
8. A. plants B. jars C. gardens D. throws
9. A. elephants B. protects C. handbooks D. cleans
10. A. foxes B. bottles C. clothes D. magazines
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 :)