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Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.
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Answer:
Phase transition is when a substance changes from a solid, liquid, or gas state to a different state. Every element and substance can transition from one phase to another at a specific combination of temperature and pressure.
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Answer:
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A catalyst
A catalyst can be in many forms
Prominent copper sulfide minerals include Cu2S (chalcocite) and CuS (covellite).
