Answer:
Key Concepts. Gay-Lusac's Law of Combining Gas Volumes states that: The volume of gases taking part in a chemical reaction show simple whole number ratios to one another when those volumes are measured at the same temperature and pressure.Avogadro argued that Gay-Lussac's law of combining volumes could be explained by assuming that equal volumes of different gases collected under similar conditions contain the same number of particles. ... The "empty" syringe is then weighed, the syringe is filled with 50 mL of a gas, and the syringe is reweighed.
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