The heat of fusion is defined as the energy required at a constant temperature to change 1 unit mass of a 1. gas to a liquid 2. gas to a solid 3. solid to a gas 4. solid to a liquid​

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

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