Tu opinión. Según lo que leíste en el artículo y tu propia experiencia, ¿te parece que la tecnología ofrece más ventajas (advantages) que desventajas, o lo contrario?  Escribe un párrafo con al menos cuatro oraciones explicando tu respuesta y ofrece ejemplos específicos para apoyar tu perspectiva.   

Algunos médicos piensan que el uso de los aparatos tecnológicos puede provocar problemas de salud.

Fill in the blanks with the correct forms of the indicated verbs and the appropriate pronouns.  1. A mí (encantar) las películas de misterio.  2. A Gregorio (molestar) mucho la nieve y el frío.  3. A ustedes (faltar) un libro de esa colección.  4. ¿ (quedar) bien los sombreros a ti?  5. A ella no (importar) las apariencias (appearances).  6. A mí los deportes por televisión (aburrir) mucho.

H-NMR ID of Unk – Level 3 Which of the following molecules best fits the NMR spectra above?

Level 1 – Mass Spec Analysis A student injects a 100% pure simple alkane sample onto a mass spectrum and obtains the following spectrum.  Identify the simple alkane from the provided choices below.  

Level 3 – IR Spectrum Reading (1 of 2) A: B: C:D:  Which of the spectra above would would least likely correspond to carbonyl containing compound? 

Level 1 – C-NMR Signal Prediction How many signals would Acetone show on a decoupled 13C-NMR spectrum?

Level 2 – TLC – Standard Phase Conditions When examining cyclohexanone, which of the following IMFs described below would be likely responsible for keeping the Rf low during a standard-phase TLC experiment?

Level 2 – Recrystallization – Solute Properties Based on Solubility Given the following information concerning Compound Y: Compound Y did not dissolve at all in benzene at any temperatures. Compound Y dissolved completely in hot, but not cold propanol. Compound Y dissolved completely in an water at all temperatures. What can be inferred about the compound Y’s polarity?

Level 3 – Chromatography – Columns vs TLC TLC plates are essentially miniature column chromatography experiments. The order in which the analytes travel is proportional to the order in which the analytes would elute off of a column. Four compounds consisting of propanol, cyclohexene, 3-amino-hexanoic acid, and acetic acid, were combined and added onto a silica gel column with a mobile phase of hexane:ethyl acetate (10:1 v/v). Predict the compounds elution order from first to elute (1) to last to elute (4) based on IMFs.