Демонстрация химического эксперимента “Египетская ночь“
С учениками группы “Естествознания“ проводим замечательный химический опыт “Египетская ночь“
4 months ago 00:01:21 3
5 months ago 00:08:10 1
5 months ago 00:21:33 1
5 months ago 00:33:22 1
5 months ago 00:41:33 1
5 months ago 00:03:15 1
5 months ago 00:11:19 1
6 months ago 00:02:39 1
7 months ago 00:05:19 1
7 months ago 00:12:09 1
8 months ago 00:08:22 2
9 months ago 01:36:42 1
9 months ago 00:19:09 13
9 months ago 00:02:32 5
10 months ago 00:01:49 1
10 months ago 00:15:39 1
10 months ago 00:57:02 1
10 months ago 00:02:29 2
11 months ago 00:01:44 1
11 months ago 00:10:37 1
11 months ago 00:04:17 1
11 months ago 00:08:29 1
11 months ago 00:07:22 1
11 months ago 00:05:18 1
