Chemistry, 14.02.2020 01:08, miacespedes
Hydrogen gas is allowed to permeate through a thin plastic membrane that is 76 microns thick.
Concentrations of 0.025 moles/m3 and 0.0025 moles/m3 are maintained on the high and low pressure sides of the membrane, respectively.
If the diffusivity of hydrogen gas molecules in the plastic is 2.2x10-8 m2/s, how many moles of hydrogen gas pass through a 3.0 square meter area of the plastic membrane every hour ?
Hint: We are really computing a flow rate here, rather than a flux. A flow rate is equal to a flux multiplied by an area, and its units are generally count / time.
In this case specifically, the flow rate units will be mol / hour.
In other scenarios, the units could be gram / hour, atom / hour, molecule / hour, etc.
Answers: 3
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How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next
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Hydrogen gas is allowed to permeate through a thin plastic membrane that is 76 microns thick.
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