How much ethanol could be oxidized by potassium dichromate?

The question is incomplete. $\left[{K}_{2} C {r}_{2} {O}_{7}\right]$ remains unspecified. Of course the molar mass of potassium dichromate is $294.19 \cdot g \cdot m o {l}^{-} 1$ but I think you know this already.