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Laboratory Apprentice

Which piece of laboratory glassware is best used to measure 1.000 L of solution accurately?

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Major Product

What is the major product of the following reaction?

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Colligative Property

Which of these properties is not a colligative property of a salt solution?

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Mystery Compound

A reagent bottle with the label “brominated benzene” shows two peaks in the carbon NMR spectrum. Which of the following are possible structures for the mystery compound?

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The Forces Responsible

The forces responsible for the relatively high melting point and boiling point of water, H2O, are:

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Administering Nitrous Oxide

One of the tanks that a pediatric dentist uses to administer nitrous oxide is “empty”, meaning that the N2O inside is at the same temperature and pressure as the room. The ML-6 type cylinder has an internal volume of 165 liters. How many moles of nitrous oxide remain in the empty tank (Ideal gas constant = 0.082 L atm/K mol; assume the apparatus is at sea level; the ambient temperature is 22° C)?

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Photo attributed to Jurvetson.

Mg and Ar

In a reaction between Mg and Ar, which of the following is most likely to occur?

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Endothermic Chemical Reaction

Which of the following is at the highest energy during an endothermic chemical reaction?

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Valence Electron Configuration

Which of the following elements would contain the valence electron configuration 4s24p5?

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Pure Covalent Bond

Which of the following molecules has a bond that is nearest to a pure covalent bond?

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Photo attributed to Rudolf_Schuba.