Which sample of matter has the greatest distance between molecules at STP?

A)
N2(g)

B)
NH3(aq)

C)
C6H14()

D)
C6H12O6(s)

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.