Question

Under certain conditions argon (Ar) gas diffuses at a rate of 3.2 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.5 centimeters per second. What is the approximate molar mass of the unknown gas?

10 g/mol

20 g/mol

28 g/mol

56 g/mol

Answer 1

\[\frac{ R _{2} }{ R _{1} }=\sqrt{\frac{ M _{1} }{ M _{2} }}\] where R is rate and M is molar mass

Answer 2

So R2=4.5 R1=3.2 & M1=39.948 M2=X?

Answer 3

Yup :)

Answer 4

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