1. A 1.00 g sample of aluminum reacts with sulfuric acid. 1.38 L of gas was collected at 30°C and 758 mm Hg? The gas is collected over water. The water
vapor pressure at 30°C is 31.8 mm Hg. What is the percentage yield of the gas?

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?