Question

Under certain conditions, neon (Ne) gas diffuses at a rate of 7.0 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.9 centimeters per second. What is the approximate molar mass of the unknown gas?

20 g/mol
11 g/mol
6.5 g/mol
41 g/mol

Answer 1

I believe it's 11 g/mol.

Answer 2

Thank you!