If 1.12 mole of sodium phosphate react, how many moles of sodium chloride are produced? (Show or explain work plz)

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

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.

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?