c(C₆H₈O₇) = 0,47 M = 0,47 mol/L.
If we have one liter of solution:
V(solution) = 1 L.
n(solution) = 0,47 mol.
According to molecular formula of compound this can be citric acid.
Citric acid dissociation in water: C₆H₈O₇ → C₆H₅O₇³⁻ + 3H⁺.
There is four ions from one citric acid. Molarity is than c = 4 · 0,47 M = 1,88 M.