Which of the following MOST LIKELY causes the rate of a chemical reaction to increase? Decreasing the reaction temperature

Grinding up a solid reactant

Adding an inhibitor

Using a larger container

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).