在 300 K , 3.00×10 6 Pa 时,某气筒内封存有 10 mol 氧气,将此气筒加热到 373 K 时开启阀门放出氧气,在保持温度不变的情况下压强降到 1.00×10 5 Pa , 则放出氧气的质量为
A.
8.58 g
B.
311.42 g
C.
85.8 g
D.
64.23 g
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