what is the consequence of hydrogen bond between water and ammonia?

Question

For example, the hydrogen bond in water gives it many properties like making it less dense. What could be the consequence of hydrogen bonding between ammonia and water or other compound like ethanol that forms hydrogen bond with water?

Answer 1

One of the main "consequences" of hydrogen bonding between water and ammonia, or between water and ethanol, would be the relative solubility of these two compounds.  Because of the hydrogen bonding with water, they are more soluble in water than would be corresponding analogs without hydrogen bonding.  

 

I'm not entirely sure what is meant by "the hydrogen bonding in water gives it many properties like making it less dense."  Less dense than what?  If you mean that ice is less dense than liquid water, then yes, that would be true as it has more hydrogen bonding.