Answer
See answer.
Work Step by Step
The rms speed is given by equation 13–9.
$$\frac{v_{rms,1}}{v_{rms,2}}=\frac{\sqrt{3kT_1/m_1}}{\sqrt{3kT_2/m_2}}=\sqrt{\frac{m_2}{m_1}}$$
$$=\sqrt{\frac{N_Am_2}{N_Am_1}}=\sqrt{\frac{M_2}{M_1}}$$
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