Three. PBr3 is a molecular compound, there are three single bonds and a lone pair around the phosphorus atom, making up the octet.
3 covalent P-Br bonds
Polar, because it contains unbalanced polar bonds.
PBr5 or PBr3. PBr3 is more stable.
There are five covalent bonds present in an ethyne molecule.
4
18.
The atoms in a molecule of phosphorus tribromide, PBr3, are held together by polar covalent bonds.
Polar, because it contains unbalanced polar bonds.
phosphorus tribromide.
2
PBr5 or PBr3. PBr3 is more stable.
There are five covalent bonds present in an ethyne molecule.
4
18.
0.
4.
5.
8 sigma bonds and 1 pi bond.