The rearrangement of cyclopropane to propene at 500
(CH₂)₃→
CH₃CH=CH₂

is first order in (CH2)3 with a rate constant of 6.70E-4 s⁻¹.

If the initial concentration of (CH₂)₃ is 0.183 M, the concentration of (CH₂)₃ will be _______________ M after 2105 s have passed.