The change in Gibbs Free Energy<span> </span><span> for any reaction is related to the equilibrium constant </span><span> by the simple equation- thats all i know</span>
Via the half-life equation we have:

Where A is the amount initially and final amount after some time has passed, t is the time elapsed, h is the half life time and so:

Therefore there will be 2.8125 grams left after 140 seconds.
The kinetic molecular theory of gases. May i have he brainiliest plz