Which of the following explains the vsepr geometry of a water molecule?
a. it is bent because there are four bonded pairs around oxygen.
b. it is tetrahedral because there are four bonded pairs around oxygen.
c. it is bend because there are two bonded pairs and two tons pairs around oxygen.
d. it is tetrahedral because there are two bonded pairs and two lone pairs around oxygen

It is bent, since there are two bonded pairs and two lone pairs around oxygen

Explanation:

In order to assign VSEPR geometry, we firstly need to draw a Lewis structure of a molecule. The following steps should be taken:

calculate the total number of valence electrons: each hydrogen contributes 1 (a total of 2 for two hydrogens) and oxygen contributes 6. This yields a total of 8 valence electrons;assign a central atom (usually a single atom in the structure), in this case, this is oxygen;assign single bonds to the terminal atoms (hydrogen atoms);add octets to terminal atoms (this doesn't apply, hydrogen can have up to two electrons and they're already assigned in a bond);calculate the number of electrons assigned: a total of 4 (two in each bond);assign the remaining electrons (8 - 4 = 4) as lone pairs on oxygen: this would provide two lone pairs on oxygen.

As a result, we have a molecule with two bonds and two lone pairs on the central atom, therefore, VSEPR theory predicts a bent molecule with a bond angle of about .

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