Solute A associates in water. When \( 0.7 \, \mathrm{g} \) of solute A is dissolved in \( 42.0 \, \mathrm{g} \) of water, it depresses the freezing point by \( 0.2^{\circ}\mathrm{C} \). The percentage association of solute A in water, is:
[Given: Molar mass of A \( = 93 \, \mathrm{g \, mol^{-1}} \). Molal depression constant of water is \( 1.86 \, \mathrm{K \, kg \, mol^{-1}} \).]
