Lily is doing a science experiment with a substance in a sealed jar. At first, the substance's molecules are moving around each other. What will
happen to Lily's substance if she transfers energy into the substance and
causes a phase change? After the phase change, the substance's
molecules will move...'
faster, and the substance will be a liquid.
faster, and the substance will be a gas.
slower, and the substance will be a solid.
slower, and the substance will be a liquid.

Ethene molecular fórmula= c2h4molecular weight = 29.046g/molhope it : )

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic