Chlorine has two isotopes. the isotope with a mass of 34.969 amu has a relative abundance of 75.77%. the isotope with a mass of 36.966 amu has a relative abundance of 24.33%. calculate the atomic mass of chlorine. show how you got answer. lots of points. big money

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.