Dimethylglyoxime, DMG, Is an Organic Compound Used to Test for Aqueous

Dimethylglyoxime, DMG, is an organic compound used to test for aqueous nickel(II) ions. A solution prepared by dissolving 65.0 g of DMG in 375 g of ethanol boils at 80.3 $\degree$ C. What is the molar mass of DMG? K_b = 1.22 $\degree$ C/m, boiling point of pure ethanol = 78.5 $\degree$ C

A) 44.1 g/mol
B) 65.8 g/mol
C) 117 g/mol
D) 131.6 g/mol
E) 553 g/mol