Problem: Acetylene (C2H2) forms when calcium carbide, CaC 2, reacts with water:
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Total gas pressure = barometric pressure (738 torr); the volume was 523 mL. At 23ƒC (C2H2 temp.), the vapor pressure of water is 21 torr. How many grams of acetylene were prepared?
Plan:
Solution: Summary of gas variables:
Skill 5-5. Using the vapor pressure of water to find the amount of a gas collected over water
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