What mass of N2H4 can be oxidised to N2 by 24g of  K2CrO4 which is reduced to Cr(OH)4−?

Moles of K2CrO4 reacted =24194 moles. 4 moles of K2CrO4 reacts with 3 mole of N2H4∴24194 moles of K2CrO4 reacts with 34×24194 moles of N2H4∴ amount of N2H4 reacted =34×24194 moles =34×24194×32 g = 2.969 g