BONUS QUESTION - It takes 194 mL of a 0.5 M NaOH solution to neutralize 300 mL of an HCl solution. What is the concentration of the HCl solution? (3 pts)
NaOH + HCL » NaCl + H, O

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).