In a solid state, the molecules have the least amount of energy. They just stick close together and vibrate in place. As the molecules gain more energy, they are able to move around more freely. In the liquid state, the molecules have enough energy to sort of tumble over each other.
Answer:
zinc reacts with 2 moles of hydrochloric acid to produce two moles of zinc(ii) chloride and hydrogen gas
Explanation:
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The answer is C) catalyst speed up reactions and activation energy
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