Questions from General Chemistry


Q: Write a balanced chemical equation for the complete combustion of pentene,

Write a balanced chemical equation for the complete combustion of pentene, C7H14. In combustion, pentene reacts with oxygen to produce carbon dioxide and water.

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Q: Glass is a mixture of several compounds, but a major constituent

Glass is a mixture of several compounds, but a major constituent of most glass is calcium silicate, CaSiO3. Glass can be etched by treatment with hydrogen fluoride: HF attacks the calcium silicate of...

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Q: If you’ve ever left bread in a toaster too long, you

If you’ve ever left bread in a toaster too long, you know that the bread eventually burns and turns black. What evidence is there that this represents a chemical process?

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Q: Balance the following chemical equation. LiAlH4(s) +

Balance the following chemical equation. LiAlH4(s) + AlCl3(s) AlH3(s) + LiCl(s)

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Q: If you had a “sour stomach,” you might try an

If you had a “sour stomach,” you might try an over-the-counter antacid tablet to relieve the problem. Can you think of evidence that the action of such an antacid is a chemical reaction?

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Q: When iron wire is heated in the presence of sulfur, the

When iron wire is heated in the presence of sulfur, the iron soon begins to glow, and a chunky, blue-black mass of iron(II) sulfide is formed. Write the unbalanced chemical equation for this reaction....

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Q: When finely divided solid sodium is dropped into a flask containing chlorine

When finely divided solid sodium is dropped into a flask containing chlorine gas, an explosion occurs and a fine powder of sodium chloride is deposited on the walls of the flask. Write the unbalanced...

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Q: A common lecture demonstration called “elephant’s toothpaste” demonstrates the reaction

A common lecture demonstration called “elephant’s toothpaste” demonstrates the reaction of hydrogen peroxide producing water and oxygen gas. Write the unbalanced chemical equation for this process.

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Q: When a strip of magnesium metal is heated in oxygen, it

When a strip of magnesium metal is heated in oxygen, it bursts into an intensely white flame and produces a finely powdered dust of magnesium oxide. Write the unbalanced chemical equation for this pro...

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Q: Which of the following statements is false for the reaction of hydrogen

Which of the following statements is false for the reaction of hydrogen gas with oxygen gas to produce water? (a, b, and c represent coefficients) a H2(g) + b O2(g) c H2O(g) a. T...

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