The molar mass of a metal (M) is 65.4g/mol and it forms a chloride of unknown composition. Electrolysis of a sample of the molten chloride with a current of 6.42A for 23.6 minutes produces 3.08g of M at the cathode.
Find the empirical formula of the chloride.

Question

The molar mass of a metal (M) is 65.4g/mol  and it forms a chloride of unknown composition. Electrolysis of a sample of the molten chloride with a current of 6.42A  for 23.6 minutes produces 3.08g  of M at the cathode.
Find the empirical formula of the chloride.

anonymous · Answer

the mass that generated on cathod is 
m=C*A*I*t/n
you need to know the n this is  valence 
C is constant  A is atomic mass
so n= C*A*I*t/m=2
your formula of cloridde :
$$MeCl _{2}$$