X, Y là hai axit cacboxylic đều hai chức, mạch hở và là đồng đẳng liên tiếp; Z, T là hai este (chỉ có chức este) hơn kém nhau 14 (đvc), đồng thời Y và Z là đồng phân của nhau (MX < MY < MT). Đốt cháy hoàn toàn 17,28 gam hỗn hợp E chứa X, Y, Z, T cần dùng 10,752 lít O2 (đktc). Mặt khác đun nóng 17,28 gam E cần dùng 300 ml dung dịch NaOH 1M thu được 4,2 gam hỗn hợp ba ancol có cùng số mol. Số mol của X trong 17,28 E là

A. 0,03.

B. 0,05.

C. 0,06.

D. 0,04.

I often call Nhuan Trach Primary School is my second home.

School children, though not very large but very spacious and clean. High school entrance and spacious, the two sides is the flower corridor leads straight to the playground and the classroom.

School Grounds em wide, around the yard Poinciana trees and ancient eagle shade cover, with flower beds and lawns green. Listed under the tree row of stone for us to read books and talk after each lesson.

The classrooms are full of tables and chairs, cabinets for learning and also exhibited the post office corner, nice article. In addition, you also have the other classrooms as music room, computer science, library, classrooms English ...

I even loved the school because here we have good friends and the teachers are always interested to teach and impart knowledge to us so people. I loved my second home! 

We are a poor family . There are altogether nine members in my family , including my father andmy mother . The children are seven in all , four boys and three girls .

My father is a hawker selling fruits in the streets of Singapore and my mother is awasherwoman . My father earns about 25 dollars a day and my mother is getting about fiftydollars a month . Though poor , ours is a happy family . My parents seldom quarrel and they arethrifty .

All my brothers and sisters are studying in English schools . My eldest brother Ronnie isstudying in secondary four in a government school . He says that he will pass this year , with four good credits at least .

On school days my brother goes to school by bus and we children are in a nearby primary school not very far from our home .

During the week-end my eldest brother helps us with our studies 

My family is small . Thera are only four members in my family . They are my father , mymother , my sister and me .

My father is a teacher . He is about forty-five years old . My mother works at home . She is afew years younger than father . My sister goes to school . She is sixteen years old . I’m five yearsyoungers than my sister .

Everyone in my family is good and happy . My father and my mother love my sister and mevery much . They buy manything for us . Sometimes they takes us to the cinema . They also tell usmany interesting stories . Sometimes thay help us in our studies .

I need , I love my family very much .