6 pts) TLC Observations: Upload your screenshots of the TLC plates at 0 minutes and 15 minutes. From the final TLC plate (at 15 minutes) calculate the approximate Rf value (measure or estimate) for the benzaldehyde starting material and the 1-phenyl-1-propanol product

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

How many grams of n2h4 will be consumed by 23 g of n2o4

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.