A sample of N2 gas (2.0 mmol) effused through a pinhole in 5.5 s. It will take __________ s for the same amount of CH4 to effuse under the same conditions.
A、5.5
B、4.2
C、7.3
D、3.1
E、9.6
发布时间：2025-08-01 12:34:44
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答案：4.2
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