For one mole of a monoatomic gas with molar mass $M$,the root mean square velocity is $u_{rms}$. What is the relationship between $u_{rms}$ and the average kinetic energy $E$?
- A$u_{rms} = \sqrt{\frac{3E}{2M}}$
- B$u_{rms} = \sqrt{\frac{2E}{3M}}$
- C$u_{rms} = \sqrt{\frac{2E}{M}}$
- D$u_{rms} = \sqrt{\frac{E}{3M}}$
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