viết lai câu

1, I left my handbag on the bus this morning

2, they grow rice in these fields

3,Mr.pike teaches us English

4, someone has stolen her motorbike

5, I bought my brother some books

6, He does exercise every morning

7, no one believes hic story

8, tom met his friends at the cinema

9, Jane has already finished the report

10, nobody has seen peter since last week

11, they have taught Math at this school for a long time

12, nam usually feeds the chickens after school

Đốt cháy 4,4(g) Cacbon trong không khí tạo thành khí Cacbonic

a,Viết phương trình hóa học

b,Tính thể tích khí CO_{2 tạo ra (đktc)}