Explain why;

1) h2o (100 °c) has a higher boiling point than ch3oh (65 °c)

a. ch3oh has a higher molecular mass than h2o.
b. there are no hydrogen bonds between alcohol molecules while there are plenty of them between water molecules.
c. there are more hydrogen bonds between water molecules than between alcohol molecules.
d. there are less hydrogen bonds between water molecules than between alcohol molecules.

2) h2o (100 °c) has a higher boiling point than nh3 (−33 °c)

a. unlike a water molecule, an ammonia molecule cannot engage in hydrogen bonding.
b. three hydrogens of an ammonia molecule can engage in hydrogen bonding, while just two hydrogens of a water molecule can engage in hydrogen bonding. c. unlike a water molecule, an ammonia molecule does not have non-bonding electron pairs.
d. only one hydrogen of an ammonia molecule can engage in hydrogen bonding, while both hydrogens of a water molecule can engage in hydrogen bonding.

3) hf (20 °c) has a higher boiling point than nh3 (−33 °c)?

a. the hydrogen bond formed by hf is weaker since fluorine is more electronegative than nitrogen.
b. the hydrogen bond formed by hf is stronger since fluorine is more electronegative than nitrogen.
c. unlike an hf molecule, an ammonia molecule cannot engage in hydrogen bonding.
d. unlike an hf molecule, an ammonia molecule does not have non-bonding electron pairs.