\( 1.80 \, \text{g} \) of solute A was dissolved in \( 62.5 \, \text{cm}^3 \) of ethanol and freezing point of the solution was found to be \( 155.1 \, \text{K} \). The molar mass of solute A is ____ \( \text{g mol}^{-1} \).
[Given: Freezing point of ethanol is \( 156.0 \, \text{K} \). Density of ethanol is \( 0.80 \, \text{g cm}^{-3} \). Freezing point depression constant of ethanol is \( 2.00 \, \text{K kg mol}^{-1} \)]
