A 12.0-cm cylindrical chamber has an 8.00-cmdiameter piston attached to one end. The piston is connected to an ideal spring as shown. Initially, the gas inside the chamber is at atmospheric pressure and 20.0 °C and the spring is not compressed. When a total of 6.50 × 10ˆ’2 mol of gas is added to the chamber at 20.0 °C, the spring compresses a distance of Δ x = 5.40 cm. What is the spring constant of the spring?

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8.00 cm 12.0 cm 5.40 cm