16 multiple choice 2 points one equivalent of ba²⁺ is equal to ___ of ba²⁺. 1.0 g 137.33 g 274.65 g 68.66 g…

Explanation:

Step1: Recall molar - mass of Ba

The molar mass of Ba is approximately 137.33 g/mol.

Step2: Determine the relationship between equivalents and moles for $Ba^{2 + }$

For a divalent ion like $Ba^{2+}$, the number of equivalents per mole is 2. One equivalent of an ion is calculated as $\text{Equivalent}=\frac{\text{Molar mass}}{\text{Valence}}$. For $Ba^{2+}$, with a molar mass of 137.33 g/mol and a valence of 2, the mass of one equivalent is $\frac{137.33\ g/mol}{2}=68.665\ g\approx68.66\ g$.

Answer:

D. 68.66 g