If 6.57g of iron are reacted with 4.35g of hydrochloric acid (HCl) and 17.63 g of iron(III) chloride (FeCl3) are obtained. Calculate the theoretical yield and percent yield of FeCl­3. Iron is the limiting reactant. ( please don't answer with " answer is on file" it doesn't help me)

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?