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

question 26

Multiple Choice

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

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Definitions:

Bilateral Symmetry

A body plan in which a central longitudinal plane divides the body into two equal but opposite halves.

Barnacles

Marine crustaceans with hard protective shells, known to attach permanently to surfaces like rocks and ships' hulls.

Arthropoda

A phylum of invertebrate animals with exoskeletons, segmented bodies, and jointed appendages, including insects, arachnids, myriapods, and crustaceans.

Annelida

A phylum of segmented worms including earthworms, leeches, and their relatives, characterized by a segmented body and often a well-developed coelom.