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The question asks for the mass in grams of a single atom of bromine (Br), ensuring the answer has the correct number of significant digits.

### Steps to solve:

1. **Molar Mass of Bromine (Br):**
   The molar mass of bromine is approximately 79.904 g/mol.

2. **Avogadro's Number:**
   Avogadro's number, \( N_A \), is \( 6.022 \times 10^{23} \) atoms/mol. This gives the number of atoms in one mole of any substance.

3. **Mass of a Single Atom:**
   To find the mass of a single atom of Br, divide the molar mass by Avogadro's number:
   \[
   \text{Mass of a Br atom} = \frac{\text{Molar mass of Br}}{N_A}
   \]
   \[
   \text{Mass of a Br atom} = \frac{79.904 \, \text{g/mol}}{6.022 \times 10^{23} \, \text{atoms/mol}}
   \]

4. **Perform the Calculation:**

Let me calculate this now.The mass of a single atom of bromine (Br) is approximately \( 1.33 \times 10^{-22} \, \text{g} \), rounded to three significant digits.

Would you like more details or have any other questions?

Here are five related questions to explore further:
1. How would you calculate the mass of a different element's atom?
2. What role does Avogadro's number play in molecular calculations?
3. How can we measure the number of atoms in a specific sample mass?
4. What is the significance of using correct significant digits in scientific calculations?
5. How does the molar mass affect the number of atoms in a given sample?

**Tip:** Always pay attention to significant figures, especially when dealing with scientific constants and measurements, as they influence the precision of your results.

What is the mass in grams of a single atom of Br? Be sure your answer has the correct number of significant digits.

Calculate the mass of a single bromine (Br) atom in grams using its molar mass and Avogadro's constant. Includes detailed steps and correct use of significant digits. Suitable for high school chemistry students.

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