How Many Moles of Ethylene Glycol Must Be Dissolved in 500

Multiple Choice

How many moles of ethylene glycol must be dissolved in 500 g of water (K_f = 1.86 °C m^-1) to lower the freezing point to -5.00 °C?

A) 18.6 mol
B) 2.69 mol
C) 0.268 mol
D) 3.73 mol
E) 1.34 mol