The nurse is obtaining the health history of an infant in the urgent care center. The nurse suspects pyloric stenosis when the parent reports which of the following as the chief complaint?

Which of the following is NOT expected to result in an efficient crossed aldol condensation reaction?

Is the following molecule optically active?  

What is the approximate pKa for the following alkyl aminium salts?  

 What is the expected product A for the following reaction sequence?  

What is the consequence for the enol formation for the following compound?

Rank the following compounds in order of decreasing Brønsted acidity (i.e. most acidic first, least acidic last)

What is the expected product A for the following Claisen condensation reaction?  

Which of the following reaction schemes would NOT be an efficient synthesis of the following molecule?

What is the expected product A for the following transformation?