Determine the contents of xh2 in the sample

Question

During coulometric titration of an organic compound, XH₂ , with an iodide solution, the time to reach the endpoint was 30.0s at 5.0 mA. ( The XH₂ molecular weight was 85.00 g/mol). F = 96490 C/mol

The reactions to consider are:

I₂ + XH₂ = X + 2HI

2I^- = I₂ + 2e^-

1. Determine the contents of XH₂ (mg) in the sample?

2. Determine the molar concentration of  XH₂ when assuming that the volume of the solution was 500 mL.