Propane CH,CH,CH3 Dimethyl ether CH,ÓCH, MW = 46 amu Acetaldehyde CH,CHO MW = 44 amu u = 2.7 D bp = 294 K Acetonitrile CH;CN MW = 41 amu MW = 44 amu u = 0.1 D bp = 231 K µ = 1.3 D bp = 248 K µ = 3.9 D bp = 355 K Increasing polarity Increasing dipole-dipole interactions A Figure 11.8 Molecular weights, dipole moments, and boiling points of several simple organic substances.

Ibuprofen, 2-[4-(2- methylpropyl)phenyl]propanoic acid, is a medication used to reduce pain, fever, or inflammation. It is slightly soluble in pure water but well soluble in alcohols. From the formula of this molecule, is it possible to determine this molecule spectrophotometrically in solution without adding any reagents? Explain why yes or why not. CH3 CH3 но H3C

To determine the molar concentration of a metal ion in a solution of unknown concentration, a student fırst made five standard solutions that contain the metal ion of interest and measured the absorbance of each solution in a spectrophotometer at its Amax- A calibration curve was obtained that had an equation of y = 5.747 x + 0.013 Next, the student pipetted 15.0 mL of the initial solution of unknown concentration into a 100.0 mL volumetric flask, and filled the flask with deionized water to the line. The absorbance of this final diluted solution was found to be A = 0.226 at Amax. The color of the original and diluted solution was blue. What is the molarity of the original solution, as well as an approximate Amax for this metal ion? 2max = 599 nm and concentration is 0.247 M Amax 457 nm and concentration is 0.247 M %3D 2 max = 457 nm and concentration is 0.0371 M 1 max 599 nm and concentration is 0.0371 M Amax = 599 nm and concentration is 0.00557 M

OD 450 Concentrations 0.105 0      0.144     3.06    0.406 31.9    1.233 108     1.909 209 Construct a calibration curve y=mx

1-31. We shall learn when we study molecular spectroscopy that heteronuclear diatomic molecules absorb radiation in the microwave region and that one determines directly the so-called rotational constant of the molecule defined by B = 8721 where I is the moment of inertia of the molecule. Given that B = 3.13 × 105 MHz for H35C1, calculate the internuclear separation for H35C1. The atomic mass of H and 35C1 are 1.008 and 34.97, respectively.

1a)Look at figure 18-3 from the reading (shown below). Which electronic transition in formaldehyde will correspond to a shorter wavelength of light?n--->pi* or pi--->pi* b)Match the the following defintion with the correct three choices, each deifntion is only used once: Absorbance, Phosphorescence, and Fluorescence -occurs at a wavelength between the two other processes  -occurs at the longest wavelength  -occurs at the shortest wavelength

I need the answer as soon as possible

OSHA's Hazard Communication Standard requires chemical manufacturers to evaluate hazards relating to their products and provide a Safety Data Sheet in accordance to the Globally Harmonized System (GHS) in which the use of pictograms (see Figure 1) is required to communicate hazard information. Predict (with reasons) two (2) hazards related to each of the two activities below, and assign two (2) relevant pictograms listed in Figure 1 to each of the two activities. Activity 1: Removing diethyl ether (last opened in 2019) using a rotary evaporator. Activity 2: Using carbon monoxide gas as a reducing agent to reduce iron chloride. Figure 1. Pictograms advised by the Globally Harmonized System for communication of chemical hazards.

I am having trouble finding the delta S rxn of ammonium chloride. I am using stand thermodynamic values found online, but I can't find the value for NH4OH. I am using 94.6 for NH4CL and 69.94 for H2O. From this, I am supposed to find delta G using 411.43 as my q sys, 3.55 as my delta T, and 8.229 as my delta H.

2. Peaks resulting transitions from n → TT* are shifted to shorter wavelengths (blue shift) with an increasing of solvent polarity. * True False