For a hypothetical rxn,
$\ce{A + 3B -> P} , \Delta H = - \pu{2x kJ/mole of A}$
$\ce{M -> 2Q + R}, \Delta H = \pu{x kJ/mole of M} $
These rxns are carried simult. in a reactor such that the temperature is constant. If rate of disappearance of $\ce{B}$ is $\pu{y M sec^-1}$, then rate of formation of $\ce{Q}$ in $\pu{M sec^-1}$ is ?