The total gas pressure after one half-life of the given reaction has to be calculated.
Rate law: It is an equation that related to the rate of reaction to the concentrations or pressures of substrates (reactants). It is also said to be as rate equation.
Half-life: The time required for half of a reactant to be consumed in a reaction is said to be half-life.
Ideal gas equation: The relationship between number of moles of a gas and the pressure of a gas is represented as follows.