Number of Electrophiles in the Given Compounds:

BF3: 0 electrophiles
CH3: 0 electrophiles
-NH2: 0 electrophiles
I: 1 electrophile
PCl5: 1 electrophile
NH3: 0 electrophiles
OH2: 0 electrophiles
SnCl4: 1 electrophile
ROR: 2 electrophiles

Explanation:

Electrophiles are chemical species that can accept a pair of electrons during a chemical reaction. They are typically electron-deficient and have a positive or partially positive charge. Let's analyze each compound to determine the number of electrophiles.

1. BF3: Boron trifluoride (BF3) is a trigonal planar molecule. It has a boron atom at the center, surrounded by three fluorine atoms. Boron has an incomplete octet and is electron-deficient. However, it does not have a positive charge or a partially positive charge, so it is not an electrophile. Therefore, BF3 has 0 electrophiles.

2. CH3: Methyl group (CH3) is a nonpolar molecule with a carbon atom bonded to three hydrogen atoms. Carbon usually forms four covalent bonds, so it has no electron deficiency. Hence, CH3 does not act as an electrophile. Therefore, CH3 has 0 electrophiles.

3. -NH2: Amine (-NH2) is a functional group consisting of a nitrogen atom bonded to two hydrogen atoms. Nitrogen has a lone pair of electrons, but it does not have a positive charge or a partially positive charge. Therefore, -NH2 does not function as an electrophile. Therefore, -NH2 has 0 electrophiles.

4. I: Iodine (I) is a halogen element in Group 17 of the periodic table. It has seven valence electrons, and it can accept an electron to achieve a stable octet configuration. Therefore, I can act as an electrophile by accepting a pair of electrons. Therefore, I has 1 electrophile.

5. PCl5: Phosphorus pentachloride (PCl5) is a covalent compound consisting of a phosphorus atom bonded to five chlorine atoms. Phosphorus has an incomplete octet and can accept a pair of electrons. Hence, PCl5 can act as an electrophile. Therefore, PCl5 has 1 electrophile.

6. NH3: Ammonia (NH3) is a polar molecule with a nitrogen atom bonded to three hydrogen atoms. Nitrogen has a lone pair of electrons, but it does not have a positive charge or a partially positive charge. Therefore, NH3 does not function as an electrophile. Therefore, NH3 has 0 electrophiles.

7. OH2: Water (OH2) is a polar molecule with an oxygen atom bonded to two hydrogen atoms. Oxygen has two lone pairs of electrons, but it does not have a positive charge or a partially positive charge. Therefore, OH2 does not function as an electrophile. Therefore, OH2 has 0 electrophiles.

8. SnCl4: Tin tetrachloride (SnCl4) is a covalent compound consisting of a tin atom bonded to four chlorine atoms