Calculate the mass of oxygen required to react with iron to produce 240 g of iron (III) oxide. 4Fe + 3O2 —--> 2Fe2O3

How air particles exert a pressure on the inside of the balloon

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

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?