Given:

Number of moles, n = 4.0 moles

Avogadro's number, L = 6.02 x 10\(^{23}\)

Number of molecules, N = ?

To find the number of molecules, you need to first identify the formula that combines or form a relationship among the three parameters above.

Number of moles, n = \(\frac{Number of molecules}{Avogadro number}\)

n = \(\frac{N}{L}\)

N = n x L

= 4 X 6.02 x 10\(^{23}\)

= 24.08 x 10\(^{23}\)

= 2.408 x 10\(^{24}\)

The correct answer is option B - 2.41 x 10\(^{24}\)