Calculate the energy equivalent of 1g of substance.

Explanation

To calculate the energy equivalent of 1 gram of substance, we can follow these steps:

### Step 1: Convert grams to kilograms
1 gram (g) is equal to \(1 \times 10^{-3}\) kilograms (kg).
\[ m = 1 \, \text{g} = 1 \times 10^{-3} \, \text{kg} \]

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