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2010 National Chemistry Olympiad
15
15
Part of
2010 National Chemistry Olympiad
Problems
(1)
2010 USNCO Local #15: Diffusion
Source:
11/23/2012
A gas diffuses one-third as fast as \ce{O2} at
10
0
ā
C
100^{\circ}\text{C}
10
0
ā
C
. This gas could be:
(A)
\hspace{.05in}\text{He (M=4)}\qquad
(B)
\hspace{.05in}\ce{C2H5F}(\text{M=48}) \qquad
(C)
\hspace{.05in}\ce{C7H12}\text{(M=96)}\qquad
(D)
\hspace{.05in}\ce{C5F12}\text{(M=288)}\qquad