The main type of attractive forces between molecules of ammonia (nh3) are ionic bonds hydrogen bonds polar covalent dipole-dipole attractions dispersion forces

Label a-f based on the table using c for concentrated and d for dilute

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

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.