Which law states that the rate of effusion is inversely proportional to the square root of the molar mass?

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Multiple Choice

Which law states that the rate of effusion is inversely proportional to the square root of the molar mass?

Explanation:
Effusion rate follows the speed of the gas molecules. At the same temperature, lighter molecules move faster than heavier ones, so they pass through a small hole more quickly. This leads to the rate of effusion being inversely proportional to the square root of the molar mass. The formal relationship between two gases is rate1/rate2 = sqrt(M2/M1). So the lighter gas effuses much faster than a heavier one. This idea is encapsulated in Graham's Law of Effusion. Other gas laws describe how pressure, volume, temperature, or amount relate to each other (like P–V at constant T, V–T at constant P, or V–n at fixed T and P) and do not describe how quickly gases escape through a small opening.

Effusion rate follows the speed of the gas molecules. At the same temperature, lighter molecules move faster than heavier ones, so they pass through a small hole more quickly. This leads to the rate of effusion being inversely proportional to the square root of the molar mass. The formal relationship between two gases is rate1/rate2 = sqrt(M2/M1). So the lighter gas effuses much faster than a heavier one. This idea is encapsulated in Graham's Law of Effusion.

Other gas laws describe how pressure, volume, temperature, or amount relate to each other (like P–V at constant T, V–T at constant P, or V–n at fixed T and P) and do not describe how quickly gases escape through a small opening.

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