If 250 ml of a 0.50 m nacl solution is diluted to 840 ml, what is the molarity of the resulting solution?
a) 0.15 m
b) 6.7 m
c) 0.60 m
d) 1.7 m
e) 0.0025 m

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.