Consider an ionic compound, mx, composed of generic metal m and generic, gaseous halogen x. the enthalpy of formation of mx is δhf° = –423 kj/mol. the enthalpy of sublimation of m is δhsub = 119 kj/mol. the ionization energy of m is ie = 469 kj/mol. the electron affinity of x is δhea = –301 kj/mol. (refer to the hint). the bond energy of x2 is be = 161 kj/mol. determine the lattice energy of mx.

Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate