Determine the weight percent (wt%) of selenium in the soil sample and find the absolute uncertainty in the weight percent of selenium. Report the weight percent and absolute uncertainty with three significant figures.

answer part C/last question only. box the answer and MAKE SURE IT IS CORRECT

PHOTOSYNTHETIC PIGMENTS 1.6 0.7 Qy D 1.4 CH. 0.6 1.2 Soret 0.5 A N- 0.4 0.8 H COOCH3 0.3 0.6 phytyl bacteriochlorophyll a 0.2- 0.4 0.1 0.2 - 300 400 500 600 700 800 700 750 800 850 900 2 (nm) 2 (nm) Figure 4.7 Absorption (left) and fluorescence (right) spectra of bacteriochlorophyll a in diethyl ether. 5. Look at this figure from Blankenship's book, Molecular Mechanisms of Photosynthesis. You can see the structure for bacteriochlorophyll a, along with its absorption spectrum. a. What is the molecular shape around the labeled carbon atom? b. What is the hybridization around that same carbon? c. Based on this structure, would you expect this molecule to absorb light in the visible spectrum? Why or why not? Absorbance Fluorescence (Arbitrary units)

G neural crest tissue - Google Sear x A CHM 112 112-1 and 112-E1 A Presentation Session Student + 8 https://app.peardeck.com/student/twkkhzvar For quick access, place your favorites here on the favorites bar. Manage favorites now Peardeck Exercises Use #3. Nitol6) + 3 Fa(6)Z NF(1) + 3 HF(G) [1: 5,0 x10°n 0.10M Calculat K 2.0M 3.5 x 10°M Pear Deck Interactive Slide Students, draw anywhere on this slide! Do not remove this bar Slide 1/2