2/18/2015 11:55 PM 0 826/1002/12/2015 03:31 PM Gradebook -Print Calculator and P

Question

2/18/2015 11:55 PM 0 826/1002/12/2015 03:31 PM Gradebook -Print Calculator and Periodic Table Print Calculator Periodic Question 26 of 27 Incorrect Map dob sapling leaming 5.40 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and c The concentration of B steadily increased until it reached 1.20 M. where it remained constant Then, the container volume was doubled and equilibrium was How many moles of A remain? re-established Number 1.2263 mol A Check Answer 0 Next Exit Previous Give Up & View Soluton ( 9 Hint

Explanation / Answer

Answer

Initial concentration of A = 5.4 M

Equlibrium concentration of B is 1.20M

Because 1 mole of A produces 1 mole of B and 1 mole of C, when the volume is doubled, the number of moles of B produced is 2.4 to maintain the equilibrium. Therefore, the moles of A left in the container is 5.4 - 2.4 = 3.0 moles.

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