Assume that each atom in a copper wire contributes one free electron. Estimate the numberof free electrons in a cpper wire having a mass of 6.4g (take the atomic weight of copper ot be 64g `mol^(-1).`

Explanation

To solve the problem of estimating the number of free electrons in a copper wire with a mass of 6.4 g, we can follow these steps:

### Step 1: Calculate the number of moles of copper.
The number of moles (n) can be calculated using the formula:

\[ n = \frac{\text{mass of copper}}{\text{molar mass of copper}} \]
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