Identify the most and the least acidic compound in each of the following sets. Leave the remaining answer in each set blank. a) oxalic acid: acetic acid: formic acid: b) 2-chlorobutanoic acid: 4-chlorobutanoic acid: 3-chlorobutanoic acid: c) p-cyanobenzoic acid: benzoic acid: p-aminobenzoic acid:

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.