This is because butterfly caterpillars are host specific. Plant-wise, the caterpillars of some butterfly species like asters, black-eyed Susan, clover, lupines, milkweed, sedum or violets. Aspen, birch, cherry, hackberry, oak or willow trees make caterpillars of other butterfly species equally happy.
each Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.ach Br-F bond would be polar or BF4-, there is an extra electron making this a polar molecule. PCl5 has the Cl atoms that must be as far apart from each other as possible and therefore would create equal but opposite pulls.
Answers. Best Answer: KCL is ionic P4 is nonpolar covalent BF3 is nonpolar covalent SO2 is polar covalent Br2 is nonpolar covalent NO2 is polar covalent I am almost sure that's how it is..I recommend you to read about the electronegativity of the elements..nswers. Best Answer: KCL is ionic P4 is nonpolar covalent BF3 is nonpolar covalent SO2 is polar covalent Br2 is nonpolar covalent NO2 is polar covalent I am almost sure that's how it is..