We know that the molar mass of silicon is 28.09 grams per mole. So, we can use the formula:
\[ \text{Number of moles} = \frac{\text{Mass}}{\text{Molar mass}} \]
Substituting the given values:
\[ \text{Number of moles} = \frac{11 \text{ g}}{28.09 \text{ g/mol}}
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