Cacbon cháy trog bình đựng khí oxi tạo ra khí cacbonic. Viết ptrinh hóa học và tính khối lượng khí cacbonic đc sinh ra trog mỗi trường hợp sau: a) khi có 6,4 g khí oxi tham gia phản ứng b) khi đốt 0,3 mol cacbon trog bình đựng 0,2 mol khí oxi c) khi đốt 6 gam cacbon trog bình đựng 19,2 gam khí oxi

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***Ex: Turn the following sentences into passive voice*** 1.People know that cars spoil the environment. -It…………………………………………………………………………………….................... -Cars………………………………………………………………………………...................... 2.People believe that the robber has lived in the next door. -It…………………………………………………………………………………….................... -……………………………………………………………………………………...................... 3.Many people believe that she is an honest person. -It…………………………………………………………………………………….................... -……………………………………………………………………………………...................... 4.They think that the president will arrive soon. -It…………………………………………………………………………………….................... -……………………………………………………………………………………...................... 5.It is reported that many passengers died in the crash. -People…………………………………………………………………………………….......... -……………………………………………………………………………………...................... 6.It is expected that the prices will rise again this month. -People…………………………………………………………………………………….......... -……………………………………………………………………………………...................... 7.It is proved that life doesn’t exist on the moon. -People…………………………………………………………………………………….......... -……………………………………………………………………………………...................... 8.They say that he has passed the final exam with the best result. -It…………………………………………………………………………………….................... -……………………………………………………………………………………...................... 9.He is said to have been in the army. -It…………………………………………………………………………………….................... -……………………………………………………………………………………...................... 10.It is believed that the man escaped in a stolen car. -People…………………………………………………………………………………….......... -……………………………………………………………………………………......................