Which statement describes the reaction represented by the equation below? n2(g) + 3h2(g) yields 2nh3(g) + 93 kj it is endothermic because energy is absorbed. it is endothermic because energy is released. it is exothermic because energy is absorbed. it is exothermic because energy is released.

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

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?