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A great video lecture conducted by experienced chemistry teacher on 11th class chemistry chapter 1 topic1.1 average atomic masses. Get full understanding or ask any questions.

Average Atomic Masses, ch 1, lec 1.3.3, Average Atomic Masses - Inter Part 1 Chemistry

5:57

Average Atomic Mass, ch 1, lec 1.3.3, Average Atomic Masses - Inter Part 1 Chemistry

25:40