Find the mass fraction of alcohol if 50g of water is added to 100g of a 96% solution.

1) Determine the mass of the solute alcohol in its solution. To do this, we multiply the mass fraction of the substance by the mass of the solution and divide by one hundred percent: 100 * 96/100 = 96g.
2) Find the mass of the solution after adding water. To do this, add the mass of water to the initial mass of the solution: 100 + 50 = 150g.
3) Find the mass fraction of alcohol in the resulting solution. To do this, divide the mass of the solute alcohol by the mass of the resulting solution and multiply by one hundred percent: 96/150 * 100 = 64% – the answer.