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jinyoungbaepisa
2 năm trước
Trộn 200ml dung dịch H2SO4 1,25M với 100ml dung dịch NaOH 2M được dung dịch X.Thêm 10,8 gam Al vào dung dịch X, thoát ra V lít khí H2 ở đktc .Giá trị V là
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Các câu hỏi liên quan

câu 1: Khoanh tròn câu đúng 1I................ a letter now 2 Jane.......... to bed at 10 o'clock on weekdays 3 I am in London this summer.I........... English 4 We............. our friends next week 5 My brother............. letters every week 6 The bus sometimes.................in the morning 7 James is a student.But he............. this week 8 Lions........... in Africa 9 Our train........................ at 9.25 10 She..................... to the cenima tonight Câu 2 Điền vào chỗ trống are,is,has, have sao cho phù hợp There......................many pupils in my class.Some of them.................. my friends.I........................ two very good friends.Tom and July.Tom.............. 11 years old.He................... red hair.July................ long brown hair.She.............. very pretty.We all...................... bicycles.Tom............... a computer too.But July and I don't................... one.I love my family very much.My dad ..................... very clever.He................ many books.My mother.................. a doctor.My brother............... a sudent in the university and my little brother..................... a baby.He............ very fat and............. big blue eyes. Câu 3 Điền vào chỗ trống các từ ; ''am,is,are,am not,isn't,aren't,have,has. I....................am a sudent.I.............lots of friends.I.............. a popular person at school.My brother.................. very young.He................. only one year old.He doesn't............. any hair.The man............... young.He............. sixty-seven.He................ gray hair.We.................... a new car.Our car................ very old.It............ black.My mother............. at home.She .................at the dentist.She ................a problem.She................ a toothache.We...............ready for the exam.We................ afraid of it.I................... lots of clothes.I............lucky.The childrent.............at the park.They............at home.My daughter................... six years old.She.................. a teenager.We.................... a beautiful garden.It...............full of flowers.My father.................... at home.Today................Monday and he............at work . em cần ngay bây giờ ạ

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