10. A helium-filled balloon has a volume of 15.8 L at a pressure of 0.980 atm and 22°C. What is its volume at the mountain, where the atmospheric pressure is 0.700 atm and the temperature is 1°C?
(A) 50.2 L
(B) 1.0 L
(C) 20.5 L
(D) 0.075 L

(E) 75 L

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