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: CH3Br, SF4 CH3Br would require the Br to be dropped and replaced with a proton to make CH4, a nonpolar molecule. SF6 is sulfur hexafluoride, an extremely stable and nonpolar gas phase molecule at STP.The polarity of SF4 is induced by its asymmetrical structure.nswers. Best Answer: CH3Br, SF4 CH3Br would require the Br to be dropped and replaced with a proton to make CH4, a nonpolar molecule. SF6 is sulfur hexafluoride, an extremely stable and nonpolar gas phase molecule at STP. The polarity of SF4 is induced by its asymmetrical structure.