volume - chem?

Question

What volume of 1-butanol corresponds to 0.040 mol? (MW and density of 1-butanol are 74 g mol, 0.806 g mL

a) 3.67mL
b)4.35mL
c)2.96mL
d)2.38mL

Answer 1

n = m / M, so 0.040 = m / 74 => m = 2.96 g.
ρ = m / V, so 0.806 = 2.96 / V
=> V = 2.96 / 0.806 = 3.67 mL.