To find the number of moles, use the formula:
\[
\text{moles} = \text{molarity} \times \text{volume (L)}
\]
Given that the molarity is 0.500 M and the volume is 200.0 mL (which is 0.200 L), we have:
\[
\text{moles} = 0.500 \, \text{M} \times 0.200 \,
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