Hoàn tan 3,38 gam oleum A vào $H_{2}0$ được dung dịch X. Để trung hòa X cần 800 ml KOH 0,1 M. Tìm công thức oleum.

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I.Give the correct form of the word in the blankets 1.we didn't agree his_______________.(DECIDE) 2.___________ covers the sky at night.(DARK) 3.My village is very quiet an___________.(PEACE) 4.Please don't ask much__________ questions.(PERSON) II.Give the correct verbs in the blankets:Future Simple or Future Continuous 1.What you(do)_____________ at 9p.m tomorrow? 2.I(explain)___________ that problem to you when I come back next week. 3.He(work)_________ on the report at this time tomorrow. 4.I(call)____________you as soon as I meet him to night III.Write the second sentence so that it has a similar meaning to the first one 1.The will hold a farewell party this weekend. -> A farewell____________ 2.We won't paint these walls tomorrow. ->These walls______________ 3.People will use a lot of money on building the school. ->A lot of money_______________ 4.They will build a dam in this area. ->A dam______________ 5.Will she tell a story bout her class? ->_____________ a story______________ 6.I won't finish the report until my father comes. ->The report___________ IV.Give correct form og the word in the blankets 1.Hedrives_____________.Her rarely has accident.(CARE) 2.The singers sang_____________ last night.(GOOD) 3.Rubber trees are very___________.(USE) 4.How__________ the street it! (DANGER) V.Complete these sentences with tag questions. 1.Let's go to the cinema,_____________________? 2.You have buoght a new house,____________? 3.He didn't belive me,_______________________? 4.I'm right___________________________________? VI.Rewrite the sentences using the words given 1.My grandmother grew sunflowers but she doesn't any more. (used to) 2.She had not finished the report.She went to sleep. (Although) 3.Although the roads are muddy,the children walk to school. (In spite of) 4.I will invite her to my birthday party tomorrow. (She) 5.China has more population than America. (Less) 6.I prefer listening folk music now,although when I was young I didn't like it (didn't use)