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How many hydrogen bonds can be formed in NH[math]_3[/math]?

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Hydrogen bonding requires a lone pair on an electronegative atom, which will therefore have a slight negative charge, and a hydrogen atom attached to an electronegative atom, which will have a slight positive charge. read more

When more molecules are present, as is the case with liquid water, more bonds are possible because the oxygen of one water molecule has two lone pairs of electrons, each of which can form a hydrogen bond with a hydrogen on another water molecule. read more

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