What is a reference point? A. The location of an object after it has been in motion
B. The origin of an XY coordinate grid
C. the location where the direction of motion changes
D. A starting position on which other information is based

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?