What is the δg under standard temperature for the following reaction between? nh3(s) → nh3(l) given: nh3(s): δhf= –46.11 kj; δsf=192.45 j/k nh3(l): δhf= –80.29 kj; δsf=111.3 j/k

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.

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

What produces wave a)sound b) heats c)transfer of energy d)vibrations