Weak acids are usually one of the following: 1. hydrofluoric acid, , 2. acids in which the proton is not bonded to an oxygen atom or a halogen (ex. ), 3. where the number of oxygen atoms equals or only exceeds by the number of ionizable (ex. ) or 4. (ex. ).

1).  Weak acids are usually one of the following: 1. hydrofluoric acid, .

2). Acids in which the proton is not bonded to an oxygen atom or a halogen (ex. HCN ).

3). Oxo-acids where the number of oxygen atoms equals or only exceeds by 1 the number of ionizable protons (ex.) or

4). Carboxylic acids (ex. ).

Explanation:

Weak acids are the species which partially dissociate into ions when added to water. For example, acetic acid () is a weak acid.

Acids in which the proton is not bonded to an oxygen atom or a halogen is HCN.

Oxo-acids are the acids which contain oxygen atom. For example, , , R-COOh etc are all oxo-acids.

In oxo-acids, the number of oxygen atoms equals or only exceeds by 1 the number of ionizable protons.

Thus, we can conclude that:

1).  Weak acids are usually one of the following: 1. hydrofluoric acid, .

2). Acids in which the proton is not bonded to an oxygen atom or a halogen (ex. HCN ).

3). Oxo-acids where the number of oxygen atoms equals or only exceeds by 1 the number of ionizable protons (ex.) or 4. Carboxylic acids (ex. ).

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.