IR spectroscopy can be used to determine if you successfully separated the contaminant and benzoic acid mixture. Wha peaks would indicate that benzoic acid was still present? Select one: a. O b. A broad peak at 3400 cm-¹. c. O d. A sharp, strong peak at 1750 cm-¹. O e. Strong, sharp peaks at 2950, 1750, and 1200 cm-¹. Strong, sharp peaks at 3050, 1600, and 1500 cm-¹. A broad peak from 2800-3200 cm-1 and a sharp, strong peak at ~1700 cm-¹. O f. Sharp, strong peaks at 3400 and 1200 cm-¹. cr cr CI CI CI CI

yout References Mailings Review View rt Endnote t Footnote ✓ w Notes es 5 Search Researcher Absorbance 5 4.5 4 3.5 2.5 2 1.5 1 0.5 0 Research 0 Insert Citation 1 1. Construct a standard curve in Excel by plotting concentration (in ppm) on your x-ax (unitless) on your y-axis for your known solutions. Label the axes on the graph and provi title. See Figure 5 in the lab handout for an example. Use a linear trendline to generate a data. Label the graph with the equation and the R2 value. Insert your labeled graph in the Help Manage Sources Style: [APA 2 Bibliography Citations & Bibliography Sciwheel Nitrate Standard Curve 3 4 ty=0.8842x-0.8191 R²=0.9509 Q..**. Concentration Insert Caption 5 6 Insert Table of Figure Update Table Cross-reference Captions ww 7 2. Using the equation from your graph, determine the nitrate concentration (in ppm) in each of samples. Text Predictions: On Accessibility: Investigate O Search 8509 FORGE *

C. Cr(C104)3 Show Hint

____GaF3  + ___Cs-->  ____CsF  + ____Ga     A. (2,2,3,1)   B. (1,3,2,1)   C. (1,3,3,1)   D. (2,3,1,3)   E. (1,2,3,1)