Nitrogen gas is found to effuse through a porous barrier in 2.5 min. Under the same condition of the temperature and pressure, it takes an equal volume of unknown gas 243.28 seconds to refuse through the same carrier. What is the molar mass of this unknown gas?

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he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".