5. En el laboratorio se dispone de una disolución concentrada de ácido clorhídrico del 30% en masa y densidad 1.15g/cm3.Calcula: a) Molaridad

b) La fracción molar del ácido clorhídrico.

c) La molalidad.

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 .

One or more substances changing into one or more substances is an example of a

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.