Cân bằng các PTHH sau :
a) \(\left(NH_4\right)_2CO_3+NaOH\rightarrow Na_2CO_3+NH_3+H_2O\)
b) \(Cu+H_2SO_4\rightarrow CuSo_4+SO_2+H_2O\)
c) \(KMnO_4+HCl\rightarrow KCl+MnCl_2+Cl_2+H_2O\)
d) \(FeSO_4+KMnO_4+H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+K_2SO_4+MnSO_4+H_2O\)
e) \(Al+HNO_3\rightarrow Al\left(NO_3\right)_3+NH_4NO_3+H_2O\)
đảo ngữ câu đk loại 1
Chuyển các câu sau sang đảo ngữ:
1. If it is warm tomorrow, we will have a picnic.
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2. If your cold becomes worse, you must see the doctor.
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3. Take part in the English club and your speaking skill will be improved.
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4. Keep your feet dry or you will have a cold.
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5. If you want to go out tonight, make up your room.
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6. I'll be very angry if he makes more mistakes.
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7. If you leave your house unlocked, It will be broken into.
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8. If she forget her book, she can share with me.
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9. Turn down the radio or you will wake the baby up.
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10. If you are asked to sing an english song, what will you do?
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11. Will you phone the police first if someone breaks into your house?
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12. If he asks to bring hot water, tell him to wait for five munites.
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