According to this graph, which statement describes how the amount of iron changes over time in the reaction
fe2o3 + 3h2 → 2fe + 3h2o?
a.
the amount of the product fe increases rapidly at first and then continues to increase slowly.
b.
as time passes there is steady decrease in the amount of fe.
c.
as time passes fe2o3 and fe will reach a dynamic equilibrium.
d.
the amount of the reactant fe2o3 increases rapidly at first and then continues to increase slowly.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?