Carbohydrates easily dissolve in water due to their many hydroxide (-OH) groups forming hydrogen bonds.

A disaccharide is shown.  The hydrogen atom numbered one is bonded directly to a carbon.  The hydrogen two is bonded to an oxygen atom.  Hydrogen 3 is bonded to a carbon atom.

By Don A. Carlson GFDL or CC BY-SA 3.0, via Wikimedia Commons

Which hydrogen atom(s) can participate in hydrogen bonding in this molecule? Check all that apply.

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