In another experiment on a different metal hydrate, a student found that the salt was $62.9\%$ water. In this case, the molar mass of the anhydrous salt was $106\ \text{g mol}^{-1}$. Which of the following general formulas gives the correct value of $x$?
A.
$\ce{AaX_{x}}\!\cdot\!5\ce{H2O}$
B.
$\ce{AaX_{x}}\!\cdot\!10\ce{H2O}$
C.
$\ce{AaX_{x}}\!\cdot\!2\ce{H2O}$
D.
$\ce{AaX_{x}}\!\cdot\!6\ce{H2O}$
Exam No：AP Chemistry Problem Set 6 Year：2024 Question No：APChemistry2024AP0289
Answer:
B
Knowledge points:
3.10 Solubility
Solution:
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