Sulfur dioxide and nitrogen dioxide react at 298 K via the reaction

SO2(g)+NO2(g)⇌SO3(g)+NO(g)

A system at equilibrium contains 0.370 mol SO2 , 0.370 mol NO2 , 0.804 mol SO3 , and 0.588 mol NO. O2 is added to the container and NO reacts completely with the O2. Calculate the amount of SO3 in the container after the system returns to equilibrium.

mass SO3 : (in g)

1 answer

I'm confused. How much O2 is added?