X.  Vocabulary and expressions. 46.  Which of the following questions are in the “usted” form?  Choose all that apply.  

4. ¿De quién son los cuadernos?

IV. Los números.  Indicate whether each equation is correcto or incorrecto 16.   6 x 3 = veintiuno

Choose the correcto form of SER (= to be) for the context. 23.  Los chicos _________ estudiantes.

12. If you had to order the following elements into a chronological order, which would be #2? ¿Qué hay de nuevo? Chau. Nada. Hola, Sofía, regular. Hola, Simón, ¿cómo estás?

A patient who has rheumatoid arthritis (RA) has been taking methotrexate for 6 months and OTC NSAIDs as needed for pain. The patient reports that symptoms seem to be getting worse. The provider refers the patient back to the rheumatologist and expects the rheumatologist to:

Rank the following dienophile in order of increasing reactivity in a Diels-Alder reaction, listing the least reactive first.  

How many electrons does the HOMO of 1, 3-pentadiene have in its excited state?

What is an appropriate stepwise synthesis to carry out the conversion shown?

Identify the structure of the product from the the following reaction sequence.