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I need some help please 3. What is the relative rate of diffusion of NH3 compared to He? Does NH3 effuse faster or slower than

I need some help please
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3. What is the relative rate of diffusion of NH3 compared to He? Does NH3 effuse faster or slower than He ? 4. If the He in problem 3 takes 20sec to effuse, how long will NH3 take? 5. An unknown gas diffuses 0.25 times as fast as He. What is the molecular mass of the unknown gas

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