How many milliliters of [tex]H_{2}[/tex] gas at STP are required to fully hydrogenate 1.68 g of [tex]C_{6} H_{8}N_{2}[/tex] (adiponitrile) according to the following hydrogenation reaction scheme?

[tex]C_{6}H_{8}N_{2}(l) + 4H_{2}(g)[/tex] → [tex]C_{6} H_{16}N_{2}(s)[/tex]