2.Consult the IR spectrum of 4-methoxyphenol included below, on page 6. For each of the following functional group vibrations, list a specific (do NOT report a general range) absorption band in the IR spectrum. Report the frequencies in cm-1 (the units of the x-axis of the IR spectrum). The specific absorbance band frequency values are listed below each band. a) Alcohol O-H stretch b) Arene (phenyl or aromatic) C-H stretch c) Alkane C-H stretch

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.