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I.Circle the word which is pronounced differently from others.
1. A. funny | B. lunch | C. sun | D. computer |
2. A. photo | B. judo | C. brother | D. home |
3. A. school | B. teaching | C. chess | D. chalk |
4. A. cold | B. volleyball | C. telephone | D. open |
5. A. meat | B. reading | C. bread | D. seat |
6. A. watches | B. tables | C. houses | D. buses |
7. A. never | B. often | C. when | D. tennis |
8. A. writes | B. makes | C. takes | D. drives |
9. A. Thursday | B. thanks | C. these | D. birthday |
10. A. advice | B. price | C. nice | D. police |
Dung dịch sau phản ứng làm quỳ tím hóa đỏ chứng tỏ H 2 S O 4 còn, B a ( O H ) 2 hết.
B a ( O H ) 2 + H 2 S O 4 → BaSO4 + 2 H 2 O
n B a S O 4 = nBa(OH)2 = 17,1/171= 0,1 mol
=> mB B a S O 4 = 0,1 x 233 = 23,3 (g).
1. A. star | B. father | C. camera | D. garden |
2. A. heart | B. heard | C. learn | D. hurt |
3. A. fast | B. class | C. answer | D. apple |
4. A. check | B. recycle | C. reuse | D. environment |
5. A. each | B. sea | C. create | D. idea |
Hok tốt
1 There are 4 people in my family: my father, my mother, my sister and my. My father is the tallest,oldest and thinnest member. My sister is the youngest and the shortest member. My mother has the longest eyebrow and I have the biggest nose. My sister has a smallest mouse a baby and she has a thickest hair too and her hand is small but the hand of my father is the biggest
2 a You mustn't eat in the class
b You must study before an exam
c You must raise your hand before speaking
d You mustn't go out without asking
3 a My sister is the youngest member in my family
bThe Mekong River is the longest river of the Southeast Asia
cYou must buy the ket before travelling
d He is the best student in the class
eThe children must not drink beer
fYou must not use mobile phone for the exam
2a. You musn’t eat in the classroom.
2b. You must study before an exam.
2c. You must raise your hand before speaking.
2d. You mustn’t go out without asking.
—
3a. My sister is the youngest in my family.
3b. The Mekong is the longest river in Southeast Asia.
3c. You must buy a ket before you travel.
3d. He is the best student in class.
3e. Children must not drink beers.
3f. You must not use mobile phone during an/the exam.
Gọi M chung cho cả 2 kim loại: M + H2SO4 → MSO4 + H2
Nhận xét: nSO4 luôn luôn = nH2 = 0,015 mol
=> mMSO4 = mM + mSO4 = 1,52 + 96 x 0,015 = 2,96 gam.
