Calcula la fraccion molar de agua en 100 gramos de una disolucion del dioxido de sodio (naoh) al 50%. (p/p). (pm del naoh =40 gramos)

The phase where ice changes directly to gas is called sublimation 

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -

The answer is fossil fuels.