How many moles are present in 11.5 g of sodium?

Explanation

To find the number of moles present in 11.5 grams of sodium, we can follow these steps:

### Step 1: Identify the atomic weight of sodium.
The atomic weight of sodium (Na) is 23 grams per mole.

### Step 2: Use the formula for calculating moles.
The formula to calculate the number of moles (n) is:
\[ n = \frac{\text{given weight}}{\text{atomic weight}} \]
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