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.
(g) CBr4 polar C-Br bonds, no dipole moment C Br Br Br Br Polar C-Br bonds; no net dipole moment because all dipoles cancel each other (h) CH3COCH3 polar C-O bond, dipole moment O CH3 H3C net dipole moment 4. Draw all important resonance structure for the following species. If applicable, indicate major and minor resonance contributors (a) H2C=N=N (b) O=OâO C C C C C H H H