0 A B time (minutes) 1,4-dioxane cyclohexane

4. a. What physical property of a compound predicts whether that compound travels slowly or rapidly through a Gas Chromatograph? b. Suppose you injected a sample of 25% compound A. (bp 80 °C), 5% compound B (bp. 40°C) and 70% Compound C (bp 60 °C) on a GC. inject Circle the Chromatogram that actually fits that scenario and cross the other one out. On the correct GC, label the peaks on the chromatogram with the compounds A, B, and C. inject

please help calculate 1-3 using given data

QUESTION 15 To improve the accuracy of our linear fit between absorbance and concentration, a. add an extra data point to your linear regression where you make the assumption that pure water has an absorbance of zero. b. make sure that you choose a "Linear Regression" curve fit. c. ensure that there are no air bubbles in the cuvette. O d. use the data points only at the lower end of the concentration range because Beer's Law is not applicable for higher concentrations. QUESTION 16 What laboratory equipment do you need to prepare a 0.250 M stock solution of NaCI? O a. buret, graduated cylinder, analytical balance b. beaker, volumetric flask O. volumetric pipet, analytical balance d. analytical balance, volumetric flask