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1.6 Pre-Class Lecture duration 16 minutes 24 seconds 1.6 Pre-Class Lecture 1.6 Pre-Class Lecture	1.6 Pre-Class Lecture 23rd atoms mole moles grams o2 table times homework mass helium calcium calculation conversion tonight nitrogen oxygen calculations week 25th From Leena Nabulsi 0 likes 29 plays 0
ASTR 1523 Lecture 10 duration 49 minutes 45 seconds ASTR 1523 Lecture 10 ASTR 1523 Lecture 10	ASTR 1523 Lecture 10 universe expansion energy hubble galaxies law earth temperature matter protons galaxy distance supernova rate stars hydrogen helium ball reason class From Nathan Kaib 0 likes 19 plays 0