A Solution of 5

A solution of 5.00 g of sodium chloride in 1.00 kg of water has a freezing point of -0.299°C. What is the actual van't Hoff factor for this salt at this concentration compared to the ideal one of 2? K_f(water) = 1.86°C/m

A) 1.88
B) 1.98
C) 1.93
D) 1.83
E) 1.94