You place a balloon in a closed chamber at standard teperature and presure (stp). you cool the chamber to half of it orginal temperture while leaving the presure contant. what happened to the balloon?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction