The reaction is second order in and has a rate constant of 0.0123 at 25.0 . A reaction vessel initially contains 250.0 of 0.133 which is allowed to react to form the gaseous product. The product is collected over water at 25.0. How much time is required to produce 198.0 of the products at a barometric pressure of 703.8 . (The vapor pressure of water at this temperature is 23.8.)