A first order gas reaction A2B2 gives 2A(g)+2B(g) at the temperature 400C has the rate constant K=20*10 to the power - Chemistry - Electrochemistry

Question

A first order gas reaction A2B2 gives 2A(g)+2B(g) at the
temperature 400C has the rate constant K=20*10 to the power -4 per
sec What % of A2B2 is decomposed on heating for 900 second?

Anuradha Puri · Accepted Answer

Let a be the initial
concentration of A2B2 and x be the
concentration after 900 seconds Since the reaction is of first
order Therefore,

Hence, 84 53%
A2B2 
is decomposed on heating for 900 seconds

A first order gas reaction A2B2 gives 2A(g)+2B(g) at the temperature 400C has the rate constant K=20*10 to the power -4 per sec. What % of A2B2 is decomposed on heating for 900 second?