2. Realicen las representaciones de Lewis (más la ecuación de formación en caso de que sea iónica o las fórmulas semidesarrolladas en caso de que sea covalente) de las siguientes

moléculas: a)CO2 b)NH3 c)H2 d)H2S e)NaBr f)MgI2 g)K2Se h)Li2S i)O2 j)N2

k)P2O5 l)SO3 m)HCl n)CuO ñ)Fe2O3 (el hierro con tres electrones en el último nivel)​

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.