For the gaseous reaction X⇌Y in a sealed vessel, measurements show that at a particular instant the reverse reaction is proceeding twice as fast as the forward reaction. Which statement most accurately describes the net conversion occurring at that instant?
(a) X is being converted to Y faster than Y is being converted to X.
(b) The amounts of X and Y remain constant because the two reactions balance.
(c) Y is being converted to X faster than X is being converted to Y.
(d) Neither X nor Y is changing because the reaction has temporarily stopped.