Final answer:
To calculate the number of moles from the given number of atoms (3.5 x 10²⁴), divide by Avogadro's number (6.022 x 10²³ atoms/mole) to get approximately 5.81 moles.
Step-by-step explanation:
To find the number of moles when 3.5 x 10²⁴ atoms are present, we use Avogadro's number, which is approximately 6.022 x 10²³ atoms/mole. We divide the total number of atoms by Avogadro's number to get the moles:
Number of moles = (3.5 x 10²⁴ atoms) / (6.022 x 10²³ atoms/mole)
Calculating this, we get:
Number of moles = 5.81 moles
Note that this number is not an exact match for the choices provided, which means that either the choices are incorrect or we have some missing context for this specific question. However, applying the general concept as explained will help you solve similar problems regarding moles and number of atoms.