How many molecules are in 6.5 moles of butane (C4H10)?

a
3.9 x 1024 molecules of butane

b
1.1 x 10-23 molecules of butane

c
5.1 x 1024 molecules of butane

d
6.0 x 10-23 molecules of butane

c. 5.1 x 10^24 molecules of butane