Which compounds have carbon-carbon double bonds?

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Ineed ! i have no clue how to do this problem.