Answer:
Moon I am guessing. Another option is comet, but they normally don't orbit a planet.
Volume will decrease over time, the more particles removed, is making the volume decrease.
A chemical change is a change that cannot be reversed, usually chemically combining the elements together (hence the name). The composition of the element also changes.
When boiling the egg, the yolk and the liquid inside both undergo a chemical change. You will notice that the yolk and liquid cannot be liquified again.
Hope I helped :)
Answer: C. Oxygen Gas
Explanation: When Hydrogen Gas and Oxygen Gas combine together it forms water correct. When you have an excess amount of another it stays neutral because it has no other molecule to react with.
6.02 times 10 to the 23rd power