Answer
ohm* farad = second
Work Step by Step
from $ R =\frac{V}{I}$ and $ C = \frac{Q}{V}$
Ohm* farad = (volt/ Ampere) * (columb/ volt)
ohm* farad = columb/ Ampere
from $ I = \frac{Q}{T}$
ohm* farad = columb /(columb/second)
ohm* farad = second