In this question you should assume that all gases behave ideally. Hydrogen and iodine react reversibly in the following reaction. The system reaches dynamic
equilibrium.
H2(g) + I2(g) 2HI(g) ∆H=–9.5kJmol–1 Which statement must be true for the Kp of this equilibrium to be constant?
A The partial pressures of H2, I2 and HI are equal.
B The external pressure is constant.
C The forward and reverse reactions have stopped.
D The temperature is constant.

B

Explanation:

The number of moles of each reactant is equal, there by pressure has no effect on the chemical system. Pressure is constant

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.