Multiple choice
during
a. the number of neutrons always decreases.
b. the number of neutrons always increases.
c. the number of protons always increases.
d. the number of protons always decreases.

For the reaction i2(g)+br2(g)←−→2ibr(g), kc=280 at 150 ∘c. suppose that 0.450 mol ibr in a 2.00-l flask is allowed to reach equilibrium at 150 ∘c. what is the equilibrium concentration of 2ibr, i2, br2