If \( 20 \mathrm{~cm}^{3} \) gas at \( 1 \mathrm{~atm} \) is expand...

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If \( 20 \mathrm{~cm}^{3} \) gas at \( 1 \mathrm{~atm} \) is expanded to \( 50 \mathrm{~cm}^{3} \) at
P constant \( T \), then what is the final pressure (in atm)

W
(1) \( 20 \times \frac{1}{50} \)
(2) \( 50 \times \frac{1}{20} \)
(3) \( 20 \times 50 \)
(4) None of these
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