Several drops of litmus indicator solution are added to a test tube containing a colorless solution and the solution turned blue. Several drops of thymolphthalein indicator are added and the solution remained colorless. What can be said about the pH of the solution?

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Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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?