The normal boiling point of ethanol is 78.3C. At this temperature, the vapour pressure of an ethanolic solution is 96 kpa. Calculate the mole fraction of the solute

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:

your answer would be a. 12.5 kg

it means there are 3 atoms of oxygen