How many grams of caustic soda should be taken to prepare 2 liters of solution with a concentration of 10%

How many grams of caustic soda should be taken to prepare 2 liters of solution with a concentration of 10% and a density of 1.080 g / cm3?

Given:
V solution (NaOH) = 2 l = 2000 ml
ω (NaOH) = 10%
ρ solution (NaOH) = 1.080 g / cm3 = 1.080 g / ml

To find:
m (NaOH) -?

Decision:
1) Calculate the mass of the sodium hydroxide solution:
m solution (NaOH) = ρ solution (NaOH) * V solution (NaOH) = 1.080 * 2000 = 2160 g;
2) Calculate the mass of sodium hydroxide in the solution:
m (NaOH) = ω (NaOH) * m solution (NaOH) / 100% = 10% * 2160/100% = 216 g.

Answer: The mass of NaOH is 216 g.