Rewrite the following equations and add coefficients in the blanks if the elements in the reaction need to be balanced. 14. ___Mg + ___HCl à ___H2 + MgCl2

15. ___ Al + ___Cl2à ___AlCl3

16. ___Fe + ___H2SO4à ___H2 + ___Fe2(SO4)3

17. CaBr2 + ___Ni2O3à ___NiBr3 + ___ CaO

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.