To find the number of molecules in 22.3 moles of CH4 (methane), you can use Avogadro's number, which represents the number of molecules in one mole of any substance.
Avogadro's number is approximately 6.022 x 10^23 molecules/mol.
So, for 22.3 moles of CH4:
Number of molecules = 22.3 moles * (6.022 x 10^23 molecules/mol)
Number of molecules = 1.34 x 10^25 molecules
There are approximately 1.34 x 10^25 molecules in 22.3 moles of CH4.