When a solution of chromium salt X is electrolysed, chromium metal is deposited on the cathode, according to the following equation.
Crn+(aq) + ne- → Cr(s)
When a current of 1.8A was passed for 40 minutes through a solution of salt X, it was found that 0.776 g of chromium had been deposited.
Calculate the value of n in the above equation. Show your working.