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Diatomaceous earth (/ˌdaɪ.ətəˈmeɪʃəs/ DY-ə-tə-M...

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Boron is a chemical element. It has the symbol ...

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Silicon dioxide, also known as silica, is an ox...

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Calcium nitrate are inorganic compounds with th...

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Spectrophotometry is a branch of electromagneti...

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Sulfur (also spelled sulphur in British English...

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An alum (/ˈæləm/) is a type of chemical compoun...

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The western desert of Egypt was a major source ...

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