He gas

Bailey BrownBailey Brown Staff asked 3 years ago

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

1 Answers
Best Answer
Selena TateSelena Tate Staff answered 3 years ago

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.
Solution:
88