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.
it is tetrahedral because in cf4 there are 4 pairs of valence electron and they all are bond pairs there are not any lone pair so it is 100% tetrahedral. â¦  Each florine is more electrongative than the carbon and tend to  attract electrons more than the carbom giving the florines a  negative charge. In most situations this would lead to the molecule  being polar but remember! The florines are opposite of eachother.