Bài 15: Định luật bảo toàn khối lượng Câu 2.Đốt cháy hết 12g kim loại nhôm Al trong không khí thu được 35g hợp chất nhôm oxit AL $_{2}$ O$_{3}$. Biết rằng nhôm cháy phản ứng với khi oxi O$_{2}$ trong không khí a. Viết công thức về khối lượng của phản ứng xảy ra b. Tính khối lượng của HCl Đã dùng

Các câu hỏi liên quan

IV. Read the text, then answer the questions below This is Peter. He is twenty-four years old and he’s an engineer. There are five people in his family: his father, his mother, his two sisters and he. His father is fifty-one and he is an engineer, too. His mother is forty-eight years old. She is a doctor. His sisters are twelve and seventeen. They are students 1/. What is his name? ->…………………………….…………………………………… 2/. How old is he? ->……………………..………..……………………………………….. 3/. What does he do?->……………………..……………….………………………………… 4/. How many people are there in his family? ->……………………..……………….…………………………………..……… 5/. How old is his father?->……………………..……………….…………………………… 6/. Is his father an engineer? ->……………………..……………….………………………… 7/. How old is his mother? ->……………………..……………….………………………… 8/. Is his mother a nurse? ->……………………..……………….…………………………………..……… 9/. How old are his sisters? ->……………………..……………….………………………………………..……… 10/. What do his sister do? ->……………………..……………….……………………………………..………