The table shows the solubility of two substances in water at 20 °c.
solubility of substances
mass
(kg) solubility of sodium chloride
(g per 100 g of water) solubility of lead nitrate
(g per 100 g of water)
100 l k
200 36 54
part 1: what will be the values of l and k for 100 kg of each substance?
part 2: explain your answer for part 1.

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?