Final answer:
The number of molecules in 15 moles can be calculated using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol. Therefore, there are approximately 9.033 x 10^24 molecules in 15 moles.
Step-by-step explanation:
The number of molecules in 15 moles can be calculated using Avogadro's number. Avogadro's number is approximately 6.022 x 10^23 molecules/mol. So, to find the number of molecules in 15 moles, we can multiply 15 by Avogadro's number:
Number of molecules = 15 moles x Avogadro's number
Number of molecules = 15 x 6.022 x 10^23
Number of molecules = 9.033 x 10^24 molecules