Tungsten hexafluoride Is orne br h hst own, ith a molar mass of 2979 g mol A a g

Question

Tungsten hexafluoride Is orne br h hst own, ith a molar mass of 2979 g mol A a given temperature, how long will it take WFs to cover the distance H; can travel in 5 seconds? (s) You wish to measure the changes in pressures of gases during the course of a reaction using a closed-end mercury manometer. Suppose 758 mmHg N,0, is allowed to react to form NO according to the reaction reaction proceeds, is the sum of the pressures of N,04 and NO: present. When the total pressure is 1039 mmHg, what is the pressure of N,O,2(mmHg) , N204(g) 2 NO2(g). The total pressure you measure, as the

Explanation / Answer

the reaction is N2O4(g)--------->2NO2(g)

initial pressure of N2O4(g)= 758 mm Hg

let x= drop in pressure of N2O4 ro reach equilibrium

at Equilibrium, Partial pressure of N2O4= 758-x, partial pressure of NO2=2x

total pressure = sum of partial pressures = 758-x+2x=1039

x= 1039-758 =281 mm Hg

hence partial pressure of N2O4= 758-281=477 mm Hg

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