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H-NMR ID of Unk – Level 2 Which of the following molecules best fits the NMR spectra above?

Which adverse effect is most concerning when phenobarbital serum levels are greater than 40-50 mcg/mL?

In constructing a confidence interval for a population mean using large samples, the general structure is: x-bar +/- _______

Level 2 – Spectroscopic Characterization Which of the methods would be best for determining whether or not an alkyl halide was present?

A dataset has a variance of 16 units. You are asked to compute the standard deviation. Compute σ.

A research team is enrolling preterm infants into a study evaluating a new monitoring technology. Before enrollment, investigators explain the study purpose, risks, benefits, and alternatives to the parents and emphasize that participation is voluntary and may be withdrawn at any time without affecting the infant’s care. Which ethical principle is best demonstrated?

A multicenter neonatal study is designed to evaluate a new therapy for bronchopulmonary dysplasia. The investigators modify the protocol to reduce the number of blood samples collected after determining that additional sampling would increase discomfort without providing meaningful scientific benefit. Which ethical principle is best demonstrated?

Level 1 – C-NMR Signal Prediction How many signals would 1,3-propan-di-ol show on a decoupled 13C-NMR spectrum?

Level 2 – Snell’s Law – Refractive Index Light travels from air (n=1) into an optical fiber (n=1.44). It is observed that the light will bend towards the normal and the angle of incidence on the end of the fiber is 22 degrees. What is the angle of refraction inside of the fiber?

When interpreting confidence intervals, the probability statement applies to the method, not the specific interval. Fill in the blank: The probability that the true population parament does not fall within the confidence interval is expressed as _____.