The inert gas argon makes up about 1 percent of Earth's atmosphere. The atomic mass of argon is \( 39.9 \mathrm{u} \); \( \left(u=\right. \) atomic mass unit \( =1.661 \times 10^{-27} \mathrm{~kg} \). \( ) \) What is the RMS speed of the argon atoms if the temperature is \( \mathrm{T}=25^{\circ} \mathrm{C} \) ?
A: 431.72
B: 539.65
C: 674.56
D: 843.21
E: 1054.01
F F: 1317.51
G: 1646.89
H: 2058.61
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