can you guys give me some theory about water absorption for clay roof tiles, we need a theory that would support our water absorption test on clay roof tiles. this is the video that we based on https://www. youtube.com/watch?v=NVibXq8hGnU

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane