Answer:
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
"chlorine acts as a catalyst promoting the breakdown of ozone"
a person or thing that precipitates an event.
"the governor's speech acted as a catalyst for debate"
Explanation:
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C. Solutions are mixtures with an even, or homogenous, distribution.<span>
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Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus