In the modern periodic table, each element is represented by its symbol. The number above each symbol is its atomic number. Atomic numbers increase from left to right and from top to bottom in the table.

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).