En un vaso se han puesto 250 g de alcohol junto con 2 g de yodo, que se disuelven completamente. Calcular la concentración de la disolución en % en masa.

The translation of the question is

250 g of alcohol have been put in a glass together with 2 g of iodine, which dissolve completely. Calculate the concentration of the solution in% by mass?

The %mass by mass of the given solution is 0.794%

Explanation:

We are given

Mass of solute(Iodine) = 2g

Mass of the solvent (Alcohol) = 250g

Since the Iodine dissolves completely in Alcohol

Total mass of the solution = 250 + 2 = 252g

the formula of concentration of the solution in  % by  Mass is given by

%

%w/W =

          = 0.794%

Therefore the %mass by mass of the given solution is 0.794%

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

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