8. A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L* atm / mol * K) A. 8.42 atm B. 0.784 atm C. 0.00842 atm D. 7.84 x 10$^{-4}$ atm E. none of the above
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