Hard water contains calcium and magnesium which undergo oxidation and clog water pipes. which statement best describes this change as a chemical change?

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?

Is cutting your nails a physical or chemical change

Which functions of water in living systems would still be possible if water was not polar and did not form hydrogen bonds? check all that apply. climate regulation dissolving ionic compounds for biological reactions providing body support by exerting pressure on cell walls providing body support through buoyancy transport of nutrients within organisms temperature regulation in many organisms