Which compound is most difficult to decompose? CO, CH4, NO2, NO

What layer of the atmosphere is directly above the troposphere?

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?

How do you interpret a chromagram for what mixtures contain?