An unknown gas effuses 2.3 times faster than N2O4 at the same temperature. What is the identity of the unknown gas? A) CN2
B) NH3
C) N2O
D) O3

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.

Ineed ! i have no clue how to do this problem.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro