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Is there a way to know whether an H will be attached to an oxygen in a molecule or attached to the central atom? I noticed in some cases the H is attached to an oxygen in the molecule and other times the H is simply attached to the central atom.
Usually, you can tell by the way the formula is written. For example, CBr3OH is a molecule with the H bonded to the O, and you can tell because the formula says OH. You can also draw the correct lewis structures based on minimizing formal charges.
If you see OH in a compound, H is usually attached to O.
When you see an OH in a molecular formula, the H usually goes on the O. However, to be sure, calculate the formal charges and make sure it aligns with how you are drawing the molecules.
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