To determine the number of molecules in 5 moles of CH4 (methane), we can use Avogadro's number, which states that there are approximately 6.022 × 10^23 molecules per mole.
Number of molecules = Number of moles × Avogadro's number
Number of molecules = 5 moles × 6.022 × 10^23 molecules/mole
Number of molecules = 3.011 × 10^24 molecules
Therefore, there are approximately 3.011 × 10^24 molecules in 5 moles of CH4.