Chemistry

The red color of rubies is caused mainly by the presence of what element?

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What is a compound or mixture of chemical compounds that is used to maintain a steady pH?
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What is the name of the protein found in wheat flour?
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In evaporation, water turns into what?
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What is another name for synthetic gas made from coal?
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What is formed when metals are blended with other metals?
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What are chemicals made from oil called?
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What is the chemical symbol for lead?
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What does the word "oxygen" mean?
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