A gas has an initial volume of 24.6 L at a pressure of 1.90 atm and a temperature of 335 K. The pressure of the gas increases to 3.50 atm, and the volume of the gas increases to 31.3 L.

Use the combined gas law, since the amount of gas stays constant: P₁V₁/T₁ = P₂V₂/T₂. Rearranging gives T₂ = (P₂V₂T₁)/(P₁V₁) = (3.50 × 31.3 × 335)/(1.90 × 24.6) ≈ 785 K. The final temperature is 785 K, choice D.

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