Determine the minimum mass of sodium hydroxide required to completely absorb 33.6 liters

Determine the minimum mass of sodium hydroxide required to completely absorb 33.6 liters of carbon dioxide under normal conditions.

Given:
V (CO2) = 33.6 l

To find:
m (NaOH) -?

Solution:
1) 2NaOH + CO2 => Na2CO3 + H2O;
2) n (CO2) = V (CO2) / Vm = 33.6 / 22.4 = 1.5 mol;
3) n (NaOH) = n (CO2) * 2 = 1.5 * 2 = 3 mol;
4) m (NaOH) = n (NaOH) * M (NaOH) = 3 * 40 = 120 g.

Answer: The mass of NaOH is 120 g.