Two aqueous sulfuric acid solutions containing 20.0 wt% H2SO4 (specific gravity = 1.139) and 60.0 wt% H2SO4 (specific gravity = 1.498) are mixed to form a 4.00 gmol/L H2SO4 solution (specific gravity = 1.213). What feed rate of the 60% solution (L/h) would be required to produce 1250 kg/h of the product