In a molecule of H3O+ , how many lone pairs are the on the oxygen atom?(Remember that one lone pair = two electrons). Group of answer choices3102

In a molecule of H3O+ (Hydronium ion), the oxygen atom is bonded to three hydrogen atoms and carries one extra positive charge.

Step 1: Determine the total number of valence electrons. Oxygen has 6 valence electrons and each hydrogen atom has 1 valence electron. However, because the molecule carries a positive charge, we subtract one electron. So, the total number of valence electrons is 6 + (3*1) - 1 = 8.

Step 2: Determine the number of electrons needed for oxygen to have an octet (8 electrons). Oxygen is already bonded to three hydrogen atoms, which accounts for 3*2 = 6 of its electrons (2 electrons per bond).

Step 3: Subtract the number of bonding electrons from the total number of valence electrons. This gives 8 - 6 = 2 electrons.

These 2 remaining electrons form one lone pair on the oxygen atom. So, the oxygen atom in a molecule of H3O+ has one lone pair.