How does a hydronium ion molecule form?
a) evaporation.
b) two water molecules bonded.
c) a water molecule gained an hydrogen ion from another water molecule.
d) a hydrogen molecule bonded with an oh- molecule.
e) a water molecule split in half

C

Explanation:

Attached is the structure of a hydronium ion.

A is not the answer since evaporation is a phase change, not a structural change.  We are looking for a structural change since we are trying to form a hydronium ion.

B is not the answer since two water molecules bonded together would not produce the attached structure. It would produce a structure with two oxygens and four hydrogens.

C is the answer since water bonding to another hydrogen produces a hydronium ion.

D is not the answer since this combination would produce water.

E is not that answer since splitting a water molecule in half would take from the structure when you are actually supposed to add to it.