When mrs. green decribes the physical properties

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

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 sample at stp has the same number of atoms as 18 liters of ne at stp