Calculate the Approximate Freezing Point of a Solution Made from 21.0

Multiple Choice

Calculate the approximate freezing point of a solution made from 21.0 g NaCl and 1.00 * 10² g of H₂O. [K_f of water is 1.86 ^$\circ$ C/m.]

A) -13.4 ^$\circ$ C
B) -6.68 ^$\circ$ C
C) -3.59 ^$\circ$ C
D) 3.59 ^$\circ$ C
E) 6.68 ^$\circ$ C