Which charcoal Is used as gas mark absorbent

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?

What is a difference between a mixture of elements and a mixture of compounds

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?