Multiple Choice
A sample of He gas (2.0 mmol) effused through a pinhole in 53 s.The same amount of an unknown gas,under the same conditions,effused through the pinhole in 248 s.The molecular mass of the unknown gas is ________ g/mol.
A) 0.19
B) 5.5
C) 88
D) 19
E) 350
Correct Answer:
Verified
Correct Answer:
Verified
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