Which of the following gases will have the highest rate of effusion at a given temperature?

cl2
he
o2
ne

He.

Explanation:

The molecular weights of the given gases are:

Cl₂ = 70.9 g/mol.

He = 2.0 g/mol.

O₂ = 32.0 g/mol.

Ne = 20.17 g/mol.

Since He has the smallest molecular mass, so it will have the highest rate of effusion.

He

Explanation:

Because it has the lowest molar mass out of all the choices.

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