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A group of physics students are investigating the ideal gas law. The students use a cylinder filled with air at atmospheric pressure ($101 \text{ kPa}$). The cylinder has a moveable piston that can raise or lower depending on the ambient temperature. Raising or lowering the piston changes the volume occupied by the gas in the cylinder. The results are plotted in the graph above.

Use the slope of the graph above and universal constants to approximate the number of moles of gas in the cylinder.


$7.33 \text{ moles}$


$1.43 \text{ moles}$


$0.17 \text{ moles}$


$3.4\times{10}^{-5} \text{ moles}$

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