Mass and atoms are the properties conserved in every ordinary chemical reaction.
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Answer; chemical reaction
Answer:
To check if it's properly cleaned.
Explanation:
When you finish using a microscope, you have to take out all your samples you were using and make sure it is completely clean so that no further contamination affects future sample analysis.
Also when you begin to use it, make sure it is clean so that when you analyze your sample(s) are free from other unexpected agents.
Minerals physical characteristics are hardness,luster,the way it’s solid and chemical would be the way the color changes and it’s density
