The gas-phase solid catalyzed reaction, 3H2 + N2 + 2NH3
is carried out over an iron catalyst and proceeds by the following mechanism,
H2 + 2S + 2H. S
N2 + 25 + 2N. S
N. S+H. S + HN. S+S
NH. S+HS H2N. S+S
H2N S + H S + NH4+SS
NH3:S + NH3 + S
Derive a rate law assuming that the dissociative adsorption of N2 is the rate limiting step. You may also assume that the dissociative adsorption of H2 is very weak, since this exothermic reaction is carried out at elevated temperatures.

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.