chapter 3 lesson 10 part 2 ( chemical equilibrium -1) for 3rd secondary students ♥️
30:49
chapter 3 lesson 10 part 3 ( chemical equilibrium -1) for 3rd secondary students ♥️
26:02
chapter 3 lesson 13 part 2 (chemical equilibrium-4) for 3rd secondary students ♥️
38:17
chapter 4 lesson 15 part 2 (electrochemistry-2 ) for 3rd secondary students ♥️
35:16
chapter 3 lesson 12 part 2 (chemical equilibrium-3) for 3rd secondary students ♥️
1:02:35
chapter 4 lesson 14 part 1 (electrochemistry-1) for 3rd secondary students ♥️
50:50
chapter 3 lesson 10 part 1 (chemical equilibrium) for 3rd secondary students ♥️
5:53
Offenbar nur zwei Überlebende nach Flugzeugunglück in Südkorea
24:24