Which of the following molecules is/are bent or V-shaped?

C2H2
SiF4
H2S
SO2
CF4
HCN
NH3
COS
H2O
O3
SO3
AsH3
CS2
BF3
N2O
HN3
PF3

Why don't you look these up on Google. Better for you to do and for me to do it.

To determine if a molecule is bent or V-shaped, you need to consider its molecular geometry. The molecular geometry is determined by the arrangement of atoms and lone pairs around the central atom.

To determine the molecular geometry, you can use the VSEPR theory (Valence Shell Electron Pair Repulsion theory). According to this theory, electron pairs around the central atom repel each other and try to be as far apart as possible, resulting in specific molecular shapes.

Here is the breakdown for each molecule you mentioned:

- C2H2 (acetylene): This molecule consists of two carbon atoms triple-bonded to each other. It has a linear shape, so it is not bent or V-shaped.

- SiF4 (silicon tetrafluoride): This molecule has one silicon atom bonded with four fluorine atoms. It has a tetrahedral shape, so it is not bent or V-shaped.

- H2S (hydrogen sulfide): This molecule has one sulfur atom bonded with two hydrogen atoms. It has a bent or V-shaped geometry due to the presence of two bonding pairs and two lone pairs around the sulfur atom.

- SO2 (sulfur dioxide): This molecule has one sulfur atom bonded with two oxygen atoms. It has a bent or V-shaped geometry due to the presence of two bonding pairs and one lone pair around the sulfur atom.

- CF4 (carbon tetrafluoride): This molecule has one carbon atom bonded with four fluorine atoms. It has a tetrahedral shape, so it is not bent or V-shaped.

- HCN (hydrogen cyanide): This molecule has one carbon atom bonded with one hydrogen atom and one nitrogen atom. It has a linear shape, so it is not bent or V-shaped.

- NH3 (ammonia): This molecule has one nitrogen atom bonded with three hydrogen atoms. It has a bent or V-shaped geometry due to the presence of three bonding pairs and one lone pair around the nitrogen atom.

- COS (carbonyl sulfide): This molecule has one carbon atom bonded with one sulfur atom and one oxygen atom. It has a linear shape, so it is not bent or V-shaped.

- H2O (water): This molecule has two hydrogen atoms bonded with one oxygen atom. It has a bent or V-shaped geometry due to the presence of two bonding pairs and two lone pairs around the oxygen atom.

- O3 (ozone): This molecule has three oxygen atoms. It has a bent or V-shaped geometry due to the presence of two bonding pairs and one lone pair around each oxygen atom.

- SO3 (sulfur trioxide): This molecule has one sulfur atom bonded with three oxygen atoms. It has a trigonal planar shape, so it is not bent or V-shaped.

- AsH3 (arsine): This molecule has one arsenic atom bonded with three hydrogen atoms. It has a trigonal pyramidal shape, so it is not bent or V-shaped.

- CS2 (carbon disulfide): This molecule has one carbon atom bonded with two sulfur atoms. It has a linear shape, so it is not bent or V-shaped.

- BF3 (boron trifluoride): This molecule has one boron atom bonded with three fluorine atoms. It has a trigonal planar shape, so it is not bent or V-shaped.

- N2O (nitrous oxide): This molecule has two nitrogen atoms bonded with one oxygen atom. It has a linear shape, so it is not bent or V-shaped.

- HN3 (hydrazoic acid): This molecule has one nitrogen atom bonded with three hydrogen atoms. It has a linear shape, so it is not bent or V-shaped.

- PF3 (phosphorus trifluoride): This molecule has one phosphorus atom bonded with three fluorine atoms. It has a trigonal pyramidal shape, so it is not bent or V-shaped.

To summarize, the molecules that are bent or V-shaped are H2S, SO2, NH3, H2O, and O3.