Calculate the masses of water and sodium chloride required to prepare 150 g of a 6% solution.

Find how much sodium chloride is in the solution, express it from the formula for determining the mass fraction of a substance in a solution M (substance),
m (substance) = w (substance) * m (solution)
w (substances) = 6% = 0.06
Substituting the numerical values, we have:
m (sodium chloride) = 0.06 * 150 = 9 g
Now let’s find the mass of water:
M (water) = m (solution) -m (substance) = 150-9 = 149 g