Question

A mixture containing 5 g of H2 and 10 g of o2 is allowed to react in a 15 L rigid container at a constant temperature of 25 C.

H2+O2->H2O

Once the reaction is complete, what will be the pressure of the excess gas inside the container?

Answer 1

Follow the example of your first post to find mols of the excess gas and substitute that into PV = nRT and solve for p.