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A 5.0-liter gas tank holds 2.2 moles of monatomic helium (He) and 1.30 mole of diatomic oxygen (O), at a temperature of 310 K.

A 5.0-liter gas tank holds 2.2 moles of monatomic helium (He) and 1.30 mole of diatomic oxygen (O), at a temperature of 310 K. The ATOMIC masses of helium and oxygen are 4.0 g/mol and 16.0 g/mol, respectively. What is the ratio of the root-mean-square (thermal) speed of helium to that of oxygen?

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