Community Enrichment & E CHEM 123-General Ch > s/view.php?id-2471794 Jump to I-G

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Community Enrichment & E CHEM 123-General Ch > s/view.php?id-2471794 Jump to I-Gupta Activities and Due Dates HW 14 06:00 PM 13.9/254/3/2016 12:40 AM PrintCalculator Periodic Table 2016 24 of 25 Ma 5.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and The concentration of B steadily increased until it reached 1.20 M, where it remained constant A(s) BW-cle) Als) Then, the container volume was doubled and equilibrium was re-established. How many moles of A remain? Number mol A O Previous Give Up & View Solution·Check Answer e Next int

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Answer:

From the reaction, 1 mole of A creates 1 mole of B and 1 mole of C

The concentration of B is given as 1.2 mole / L. 1.2 mole is formed because the volume is 1 L. C is the same number of moles so the total moles in the vapor space is 2.4 moles.

If you double the volume, the concentration restablishes itself so there is a total of 4.8 moles in the vapor. Since you had 5 moles of A initially, 0.2 moles of A remain.

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