Final answer:
The number of atoms in the width of a human hair is approximately 273,000,000,000.
Step-by-step explanation:
The width of a human hair is about 60 µm (micrometers). To determine the number of atoms in the width of a human hair, we can use the Avogadro's constant. Avogadro's constant, also known as Avogadro's number, is approximately 6.022 × 1023 atoms per mole.
Since we know the diameter of a human hair is 60 µm, we can convert it to meters by multiplying it by 10-6. Then, we can calculate the number of moles of atoms by dividing the diameter by Avogadro's constant. Finally, we can convert the number of moles to the number of atoms by multiplying it by Avogadro's constant.
The number of atoms in the width of a human hair is approximately 273,000,000,000 (C).