What magnitude of current produces 1.0 kg of sodium metal in 1 hour?

Molar mass of Na = 23.0 g/mol
Mass of Na = 1 kg = 1000 g
No. of moles Na = (1000 g) / (23.0 g/mol) = 43.5 mol

Na⁺ + e⁻ → Na
Mole ratio e⁻ : Na = 1 : 1
No. of moles of e⁻ passed = 43.5 mol

Each mole of electrons carries 96500 C of electricity.
Quantity of electricity passed, Q = (43.5 mol) × (96500 C/mol) = 4.2 × 10⁶ C

Q = It
Current, I = Q/t = (4.2 × 10⁶ C) / (1 h) = (4.2 × 10⁶ C) / (3600 s) = 1.2 × 10³ A

Ian Ziering