Answer:
B: limestone cave formations
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False, pepsin and hydrochloric acid
Answer: Internal energy is the total kinetic energy and potential energy of all the particles (atoms and molecules) that make up a system.
Explanation:
Internal energy is the total kinetic energy and potential energy of all the particles (atoms and molecules) that make up a system. If a change of state happen, the energy needed for a substance to change state is called latent heat.
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Answer:
The reaction type is double displacement
It becomes gas because when the comet nears the sun, the sun freezes the comet causing it to become gas.