Suppose the following exothermic reaction is allowed to reach equilibrium. a(g) + 3b(g) ⇋ 2c(g) + 3d(g)then we make each of the following changes and allow the reaction to reestablish equilibrium. tell whether the amount of b present at the new equilibrium will be (i) greater than, (ii) less than, or (iii) the same as the amount of b before the change was imposed.(a) the temperature is decreased while the volume is kept constant; (b) more a is added(c) more c is added(d) a small amount of d is removed; (e) the pressure is increased by decreasing the volume

(a) The temperature is decreased while the volume is kept constant;

Because the reaction is exothermic when we decrease the temperature the equilibrium will shift to the right.

The amount of B will be (ii) less than before the change was imposed.

(b) more A is added

Equilibrium is shifted to the right.

The amount of B will be (ii) less than before the change was imposed.

(c) more C is added

Equilibrium is shifted to the left.

The amount of B will be (i) greater than before the change was imposed.

(d) a small amount of D is removed

Equilibrium is shifted to the right.

The amount of B will be (ii) less than before the change was imposed.

(e) the pressure is increased by decreasing the volume

The equilibrium will shift to the part where we have a lower number of moles which is the left side.

The amount of B will be (i) greater than before the change was imposed.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.