Nitric acid is a very important industrial chemical: 1.612 x 1010 pounds of it were produced in 1992. If the density of nitric acid is 12.53 pounds/gallon, what volume would be occupied by this quantity? (1 gallon = 3.7854 liters)  (a) 7.646 x 1011 liters  (b) 8.388 x 109 liters  (c) 1.287 x 109 liters  (d) 5.336 x 1010 liters  (e) 4.870 x 109 liters