Refer to the footnote in Table 14-1. How many seconds will it take for (a) H⁺ and (b) NO^-₃ to migrate a distance of 12.0 cm in a field of 7.80 × 10³ V/m?

TABLE 14-1 Mobilities of ions in water at 25c Ion Mobility [m/(s V)r" 36.30 x 108 7.92 x 10-8 7.62 x 10 7.61 X 10 8 7.21 x 10-8 H* Rb K+ NH La3+ Ba2+ 6.59 X 10 6.42 x 10-8 6.12 x 10 5.56 X 10-8 +, Ag Ca+ Cu+ Na* 8- 5.19 x 10 4.01 x 10-8 20.50 x 10 11.45 x 10-8 10.47 X 10-8 8.27 x 10 8.13 x 10-8 Lit OH Fe(CN) Fe(CN) so; Br 7.96 X 10 7.91 x 10 7.40 X 108 7.05 x 10 5.70 x 10-8 CI NO, CIO, F 4.61 X 10-8 - 4.24 X 10-8 HCO, CH;CO,