Chemistry

On a prescription, what does "QOD" stand for?

More Questions from Chemistry
What is the center of an atom called?
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What is another name for salt?
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Which is a chemical often injected into lips for plastic surgery?
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What is the name of a hydrocarbon with two carbons sp^2 hybridized?
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What is the molecular geometry of the molecule sulfur hexafluoride?
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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 oxidation number on the chromium in a dichromate ion "(Cr2O7)^2-"?
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Who wrote the book "The Principles of Chemistry"?
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