Chemistry

Which of the following substances is industrially prepared by the contact process?

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What occurs when molecules are evenly spread out in a space?
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What will usually happen to matter that is cooled?
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What was Avogadro's number?
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What element is used in manufacturing cans, foils and kitchen utensils, pipes, and window frames?
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Which chemical, also used in thermometers, was involved in early photo development?
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From all salt elements, which group is most soluble?
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What chemical substance is abbreviated CO2?
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What are substances that control the rates of chemical reactions?
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