Answer:
Chemical change :has change in mass, heat is needed, new element is formed, hard to reverse.......
Physicalchange:does not have change in mass, heat is not necessary, no new element is formed, easy to reverse
Data:




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Formula: Dilution Calculations
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Solving:
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Answer:
May i ask what is the question?
Explanation:
Answer:
it is A mark me big brain pls
Explanation:
They do not last forever. And they’re not sufficient