Chemistry

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

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What symbol appears on the periodic table for the element with the atomic number 14?
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Inhaling what gas temporarily makes the sound of a person's voice squeaky?
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Why is sodium nitrate used in processed meats?
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What is meant in saying that two liquids are miscible?
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Gold, silver, lead, and copper exhibit the properties of which of the following crystal systems?
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Which of the following best describes what water is?
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How many pounds of carbon dioxide are produced when a car burns one gallon of gas?
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What is the total energy of particles in matter called?
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