I need to know all of these questions and they need to be worked out step-by-step. Thank you so much

Where are each of the three particles located within the atom?

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

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.