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21. A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. Thepartial pressures of nitrogen, argon, and helium were 44.0, 486, and 218

torr, respectively. Thepartial pressure of neon in the vessel wastorr. A) 42.4 B) 521 С) 19.4 D) 239 E) 760

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