How many molecules are in 0.75 moles of water (H2O)? How many moles are in 4.35 X 10^24 atoms of Iron (Fe)?

How many atoms are in 200.0 grams of Sulfur (S)?

How many grams are in 3.29 X 10^25 molecules of water (H2O)?

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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?