A student puts his signature with graphite pencil. If the mass of carbon in the signature is `10^(-12)` g. Calculate the number of carbon atoms in the signature.

Explanation

To calculate the number of carbon atoms in the signature, we can follow these steps:

### Step 1: Understand the relationship between mass and number of atoms
We know that 1 mole of carbon (which is 12 grams) contains Avogadro's number of atoms, which is approximately \(6.022 \times 10^{23}\) atoms.

### Step 2: Set up the equation
We need to find the number of carbon atoms in \(10^{-12}\) grams of carbon. We can set up the proportion based on the information we have:

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