Explain how many times around the earth would the atoms

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A small speck of carbon the size of a pinhead contains about 10^19 atoms, the diameter of a carbon atom is 1.5 x 10^(-10)m, and the circumferemce of the earth at the equator is 40075km. How many times around the earth would the atoms from this speck of carbon extend if they were laid side by side

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