What are important factors to take note of when you are using a syringe to inject your sample in gas chromatography? (Select ALL that apply.)

For the mixture lab, the soda was diluted first, so the final concentration in the original drink was obtained by multiplying by the 

Why does the manual say to re-blank periodically and handle quartz cuvettes carefully?

Select all statements that correctly describe the difference between Fixed Wavelength and Spectrum/Peaks tasks in UV-Vis spectroscopy.

Which of the following are correct UV-Vis cuvette practices emphasized in the KMnO₄ and instrument labs? (Select all that apply)

A student measuring diluted Mt. Dew at 260 nm obtained: Absorbance (diluted sample) at 260 nm = [A] Caffeine calibration line at 260 nm: Dilution: [V] mL soda → diluted to 50.0 mL total Find the caffeine concentration in the diluted sample.  *Report to 2 decimal places*

A student measuring diluted Mt. Dew at 260 nm obtained: Absorbance (diluted sample) at 260 nm = [A] Caffeine calibration line at 260 nm: Dilution: [V] mL soda → diluted to 50.0 mL total Find the caffeine concentration in the diluted sample. Then Back-calculate to the original soda. *Report to 2 decimal places*

In Beer’s law work, absorbance values between about 0.1 and 1.0 give the best linearity.

What does the ensemble technique called “bagging” stand for? 

A non-zero intercept on a calibration curve always means the data are unusable.