hydrogen questions

Question

Hydrogen Bonding is

 

  1.  Occurs as a result of the attracting of polar molecules or

  2.  Exists only between water molecules or

  3.  Explains why water has such a low heat capacity or

  4.  None of these

 

 

 

The higher the percentage of salt in seawater is

 

1.  The more dense the water or

2.  The greater the buoyancy of water or

3.  The lower the freezing point of water or

4.  All of these

 

 

thanks

Answer 1

Hydrogen bonding is an intermolecular force much like dipole-dipole except that it occurs with molecules where Hydrogen is bonded to either O,N, or F. Momentary dipoles are formed (polar molecules). H-bonding is fairly strong which causes high heat capacity.

answer 1

 

If there is more salt for the same amount of water, this should mean the water is more dense.

If the water is more dense, objects can float on it more easily. With more impurities in liquids the freezing point lowers and the boiling point raises.

 

answer 4