A solution containing 12.5 g of non-electrolyte substance in 185 g of water shows boiling point elevation of 0.80 K. Calculate the molar mass of the substance. (`K_b=0.52 K kg mol^(-1)`)
A. `"53.06 g mol"^(-1)`
B. `"25.3 g mol"^(-1)`
C. `"16.08 g mol"^(-1)`
D. `"43.92 g mol"^(-1)`