What is the concentration in g.dm-3 of 0.200M of KOH solution?

Molar mass of KOH = (39.0 + 16.0 + 1.0) g mol⁻¹ = 56.0 g mol⁻¹
Molarity of the KOH solution = 0.200 M = 0.200 mol dm⁻³

Concentration in g dm⁻³ = (0.200 mol dm⁻³) × (56.0 g mol⁻¹) = 11.2 g dm⁻³