cho 5,4 g nhôm tác dụng vừa đủ với khí oxi thu được nhôm oxit theo phương trình hóa học sau :4Al+3O2->2Al2O3

a) tính khối lượng nhôm oxit (Al2O3) tạo thành 

b)tính thể tích khí oxi(đktc) tham gia phản ứng 

The internet is often described as a network of netwooks .... all the smaller networks of organizations are linked together into one giant network .... the internet . All computers are pretty much equal once connected to the internet , the ... difference will be the speed of the connection ... is dependent on your internet service provider and your own modem ... are many things you can do and participate in once connected to the internet . They include using a range of services to communicate and share information and things quickly and inexpensively ... millions of people ,... young and from diverse cultures around the world 

1.the food she eats affects her healthy badly 

-the food she eats ......... her healthy. (effect)

2.brad speaks english better than his parents do 

-brad's parents don't .....he does .(as)

3.the doctor told her to reduce the amount of sugar in her diet 

-the doctor told her ........the amount of sugar in her diet (cut)

4.damon looked so funny in his brother's tracksuit that we had to laugh

-we......at damon because he looked so funny in his brother's tracksuit (help)

5.i prefer staying bed to getting up early at the weekend 

-i'd ..........get up early at the weekend .(rather)

The internet is made ... of millions of computers linked together around the world in ... a way that information can be sent from any computer to any other 24 hours a day . These ... can be in homes , schools, universities , government departments , or busunesses.

"Where are you going next weekend ?" Ann said to Hanh 

=> Ann asked 

Will you permit me to use your didtionary ?

=> i hope don't mind