Weathering (breaking off sediments upriver), erosion (moving the sediments down river) and finally deposition caused the changes in the river. What helps hold sediments in place to prevent erosion?

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?