This is the normal nucleotide sequence on a dna strand:
a—c—t—g—g—a—t

what is a substitution?

1.) a—c—t—g—c—g—a—t

2.) a—c—t—g—a—t

3.) a—g—t—g—g—a—t

4.) a—c—u—g—g—a—u

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?