PLEASE HELP ME WITH THESE TWO QUESTIONS!!MY CHEMISTRY QUIZ IS DUE AT MIDNIGHT:(

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?

Which change to the system wood cause the freely-moving piston to lower?