4.60 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.
A (s) <—> B (g) + C (g)
Then, the container volume was doubled and equilibrium was re-established. How many moles of A remain?
Please break down the steps so I can see how to solve. Thank you!
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