chemical reaction and equation

12:54

40:06

20:52

5:03

13:33

3:35

56:41

12:23

23:59

1:04:05

25:46

5:18

1:30:21

10:17

11:24

18:52

21:56

5:01

58:42

34:06

14:03

20:53

2:29

9:00

4:19

1:03:26

2:10

50:09

10:48

6:50

7:45

8:14

53:22

14:28

24:20

33:22

16:00

18:35

25:23

17:50

26:52

18:00

8:07

11:48

15:24

8:29

9:37

1:34:46

29:21

1:14:47

33:21

1:37:30

9:28

52:41

1:32:12

16:05

20:33

24:20:56

34:13

48:04