$1.00 \text{ g}$ of a non-electrolyte solute dissolved in $50 \text{ g}$ of benzene lowered the freezing point of benzene by $0.40 \text{ K}$. The freezing point depression constant of benzene is $5.12 \text{ K kg mol}^{-1}$. Find the molar mass of the solute.
- A$280 \text{ g mol}^{-1}$
- B$356 \text{ g mol}^{-1}$
- C$562 \text{ g mol}^{-1}$
- D$256 \text{ g mol}^{-1}$
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