Which net ionic equation describes the reaction between naoh( aq) and hcl( aq)?

na +( aq) + oh –( aq) → naoh( aq)
oh –( aq) + h +( aq) → h2o( l)
na +( aq) + cl –( aq) → nacl( s)
oh –( aq) + h +( aq) → h2o( l) + na +( aq) + cl –( aq)

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 .

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

When the water vapor cools it condenses select a number that represents his process on the