91. Solving a chemistry problem

514. The electrical mobility of the NH4 ion is 7.623×10–8 m2/(V•s). Calculate 1) the molar conductivity of the ion, 2) the velocity of the ion in a conductometric cell with an electrode potential difference of 15.0 V and a distance between them of 25.0 cm, 3) the transport number of the ammonium ion in the ammonium acetate solution NH4C2H3O2, if the mobility of the acetate ion is 4.239 × 10–8 m2/(V•s).