When water reaches its boiling point and turns into water vapor what happens to its molecular structure

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Can someone me with 6 to 10 plz this is for masteries test.

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules