is mgco3 a covalent compound

9:30

6:10

کوتاه

13:21

کوتاه

کوتاه

1:07:45

3:34

5:09

4:31

38:07

5:01

3:29

7:30

2:49

2:50

12:45

13:30

کوتاه

2:54

10:05

2:31

6:19

10:51

15:02

5:47

2:07

4:01

30:12

6:06

8:28

3:35

30:20

5:24

3:39

4:33

29:59

کوتاه

13:43

3:04