Chemistry Practice Problems Effusion Practice Problems Solution: Hydrogen has two naturally occurring isotopes, 1H ...

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Solution: Hydrogen has two naturally occurring isotopes, 1H and 2H. Chlorine also has two naturally occurring isotopes, 35Cl and 37Cl. Thus, hydrogen chloride gas consists of four distinct types of molecules: 1H35Cl, 1H37Cl, 2H35Cl, and 2H37Cl. Place these four molecules in order of decreasing rate of effusion.

Problem

Hydrogen has two naturally occurring isotopes, 1H and 2H. Chlorine also has two naturally occurring isotopes, 35Cl and 37Cl. Thus, hydrogen chloride gas consists of four distinct types of molecules: 1H35Cl, 1H37Cl, 2H35Cl, and 2H37Cl. Place these four molecules in order of decreasing rate of effusion.

Solution

We can estimate the effusion of these gases by analyzing their molecular mass.

By getting the sum of atomic masses (superscript) of each atom in the molecules, we can get a molecular mass

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