Hydrogen has two naturally occurring isotopes, 1H and 2H.Chlorine also has two naturally occurring isotopes, 35Cl and37Cl. Thus, hydrogen chloride gas consists of four distincttypes of molecules: 1H35Cl, 1H37Cl, 2H35Cl, and 2H37Cl.Place these four molecules in order of increasing rate ofeffusion.

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.